Proof of Presence

1Premise

This paper begins with the author, because the problem it describes was first met as a personal one.

I came up as a jazz drummer in New York, and for most of my life music and art were the only life I knew. Then the city shut down. I was stranded in a rented room in Las Vegas, with debt, with work that had dried up, and with a few people who had taken what they could.^[44] I spent the next year and a half doing digital work, whatever would pay, with one aim: to get back to New York and to a life of music and art. I rebuilt a living from the screen. The thing I noticed, again and again, was that none of it was mine. Every account, audience and date lived inside a company that could close it.

In 2021 I was contracted to work for an NFT project that was collaborating with people from Steve Madden. That is not a small name. Steve Madden started the company in 1990 with $1,100, selling shoes out of the trunk of his car to small stores in Manhattan. It went public in 1993 and trades on the Nasdaq as SHOO. Today it is headquartered in Long Island City, with about 4,200 employees, 255 locations and revenue of roughly $2.5 billion a year.^[49] A New York footwear house of that size was working with an NFT project, and I was one of the people brought in to do the work. Not long after, I was spending evenings in Decentraland, and I met some people there who introduced me to the CyberKongz community. I met them in person. That changed my life.^[41] What I saw was a group of people holding a record in common, a public ledger of who was part of something and when, which no platform controlled and no company could withdraw. For someone who had just spent two years learning what it costs to hold nothing, it was a different kind of ground.

The rest of this paper is the argument I built on that ground. Jazz is the art whose work happens once, in a room, and is then entrusted to whoever holds the copy. The people who play it are the ones least able to prove they did. A chain is a record that does not depend on anyone's goodwill. Put the two together and a musician can keep the record of their own work. That is the Department of Jazz.

Graded C: the author's own account. The dates are approximate; the 2021 NFT run and the CyberKongz community are named in the Department's own essay, and the Las Vegas period in the author's case study. The collaboration with people from Steve Madden is the author's account and is not independently confirmed here; the company facts are from the linked source.

2The argument

Jazz is an American national treasure, born in America and played by mankind. Congress said so in 1987.^[27] A designation is not a custody arrangement: the people who make the music still do not hold the record of what they made.

Jazz did not join the music industry. It is where recorded performance began, and the industry that followed was built on selling copies of it.^[15] The copy is cheap. The night is not.

A jazz performance is improvised, so it happens once, in time, in front of people, and cannot be taken back. In jazz the product is the performance and the recording is the archive.^[1] The recording industry organised its capital around the archive. That left the source of value, the live act, underfunded, and it left the people who play it without the ledger of what they made.^[1]

Three developments make a correction possible. Generative models have made symbols (text, images, recordings, code) nearly free to produce, which makes acts of presence the scarce good.^[4] Public ledgers can record that something happened, when, and in what order, in a way no single platform can revoke.^[5] And jazz, an art built on irreversible decisions made in public, is the natural first user of a record of presence.

The Department of Jazz proposes four things.

1. A record. A dated, public, checkable ledger of what musicians make, held by the musicians.^{[5] [6]}
2. A market for performance. Authenticated editions of live sets, so the night itself is priced and the people who played it are paid by contract.^[5]
3. Services, unbundled. Marketing, production and teaching are bought openly as services and do not take the ledger with them.^[1]
4. An institution. A fellowship and a research agenda that teach and test the music.^[1]

Each of the four has a state, shown in section 21. Nothing in this paper is presented as live unless it can be checked.

3Why jazz, and why now

The essays begin from a climate: ambient intelligence that finishes our sentences, "predictive text becoming predictive life."^[1] The question they ask is whether people will still think together in public, under pressure and with consequence, or drift into a life on autocomplete.^[1] A second essay calls the condition a semantic crisis: every utterance enters a market where meaning is commodified at once, and fluent text from a model no longer signals understanding.^[2] A companion essay argues the serious conversation about AI has walked up to a door and stopped, and that the scarce goods left on the other side are acts of presence: events that happen once, in time, before witnesses.^[4]

Jazz is real-time collective intelligence. A lineage of musicians making irreversible decisions in public, each choice constraining and enabling the next.^[1] The essays go further and argue that an improvising ensemble behaves as a distributed nervous system.^[3] That essay builds on the polyvagal theory, which is contested.^{[31] [32]} What it says about ensembles is an argument and a research programme, not a measured result; section 15 separates what is established from what is a hypothesis.

It arrived as high art at the moment of mass reproduction. Recording turned jazz into a product almost at once, and the aura that Benjamin located in a work's presence in time and space was the part reproduction could not carry.^{[1] [19]} The essays call the outcome an institutional failure: the practice was misfiled as entertainment, and administrative capitalism "muzak-ified" it.^[1] Their remedy is "classification and pricing, not nostalgia."^[1]

Musicians have built institutions before. The first commercially successful jazz record, by most accounts, was made by the Original Dixieland Jass Band for Victor in New York in 1917.^[15] In 1965 the AACM was founded in Chicago and built its own performance and education opportunities.^[16] In 1971 Charles Tolliver and Stanley Cowell founded Strata-East Records, where artists kept substantial control of their recordings.^[17] The Department is a continuation of that line, with a record that is checkable by anyone.

4Who can actually play

The claim is free. On a bandstand, quality is audible within a few bars, and the room decides. On a platform it is not. Anyone can post a clip, buy a following and call themselves a jazz musician, and a feed that ranks by engagement cannot tell the difference. Those who cannot play often advertise the loudest, because the claim costs them nothing and the audience cannot check it.

The economics. This is a market in which one side cannot observe quality. Akerlof showed that when buyers cannot tell good from bad, sellers of the bad crowd out the good, because the price cannot reward quality it cannot see.^[50] Spence showed the way out: a signal separates the able from the unable only if it costs the able less to send than the unable.^[51] Crawford and Sobel showed the corollary: a message that is free to send, so-called cheap talk, carries information only when sender and receiver want the same thing.^[52] A follower count, a bio and a clip cost little to fake, so they carry little. Twenty years of dated, witnessed nights on a bandstand cost a great deal, and cannot be bought.

The institutional gap. Classical music built halls, juries, auditions, conservatories and competitions that certify who can play, which is why the field's finest ensembles are heard in rooms built for listening. Jazz was left with the club, the bar and the honour system. The Department's view, in Jazz Ascensionism and Post Semantics, is that the failure is institutional.^{[1] [2]}

The remedy. The Department keeps a record that is costly to fake: nights played, dated and fingerprinted at the time, with the players credited by the people who played alongside them. A claim with a record behind it is a signal in Spence's sense. The registry is invitation only, and the people who decide who is in are people who can play. Nothing in this section names a person or ranks anyone. It describes the market and the repair.

Limits: a record shows that a night happened and who was credited, not how well anyone played. The judgment of quality stays with the room and with the players who vouch.

5The line jazz belongs to

The argument that jazz is a body of work, and not only a genre, rests on a line of composers who treated improvisation as part of the music. Each entry below is graded: B means a third-party source is linked, anecdote means the story is told by one source and is not settled.

Tocqueville asked in 1831 where America's Virgil was. The Department's answer, in Jazz Ascensionism and Post Semantics, is that the Virgils exist and were filed under entertainment.^{[1] [2]} Whether that reading is right is an argument, not a measurement. What the table shows is narrower and checkable: improvisation is not a footnote to Western art music. It is a thread through it from Bach to Stravinsky, and recorded jazz is where that thread became an industry.

6Jungle and jazz, side by side

In 1995 a group at the University of Warwick, the Cybernetic Culture Research Unit, began writing about machines, markets and time as one system. Its founders were Sadie Plant and Nick Land.^[46] A contemporary profile notes that the unit drew much of its energy from jungle, the British rave genre also called drum and bass, which it read as hyper-syncopated rhythm made by and for machines.^[47] That is the register this paper has to be able to stand next to: theory with a pulse, and a claim about where culture is going.

The two traditions are best seen side by side. Neither is a lesser form of the other. They are two answers to one question, what a drummer can do with a break.

The centre of jungle is such a break. Gregory Coleman played seven seconds of it on "Amen, Brother", the B-side of a 1969 single by the Winstons. It went into thousands of tracks and is one of the most sampled recordings in music history. The Winstons received no royalties for it, and Coleman died homeless and destitute in 2006.^[48]

The Department honours both lines of descent, and offers each the same missing piece: a record of who played it. A performance that is captured, copied and carried around the world should still point back to the hands that made it. Each performance is fingerprinted and dated when it happens, the players are credited in the manifest and the split is fixed in the contract, so a break that circulates for fifty years still has an owner of record. This is an argument about continuity, and not a measurement. What is checkable is narrower: the sources above for the break, the royalties, Coleman's death and the founding of the unit.

7The work so far

This section sets out the work behind the Department in order, with a grade on each entry. A is anchored in a Bitcoin block or a dated public record. B is a third-party record. C is the owner's own account, offered as testimony and not as proof. A claim graded C is not used anywhere else in this paper as the basis of an argument.

The full dated record of the work, with the basis of each date (YouTube upload, release, first commit, or Notion creation), is the Work list on the JazzCats site, which serves as the encyclopedia of this paper.^[45] An invoice dated March 20, 2024 from True Design Multi Services for $88,000.00 is reproduced on the front door; it is the owner's own record and is graded C. The 1,700 percent and $7,500 figures come from the owner's own case study and are graded C; they are not used as evidence for any claim in this paper.

The essay No Neutral Posture sets out the posture behind this work: a serious artist treats the platforms as a business, builds alternatives, or drifts, and only the first two preserve practice time.^[43]

8The inversion: the performance is the product

"Own your masters" is, in these essays, a category error.^[1] The master is a fixed copy of a past event. In jazz the original is the unrepeatable performance. A system that centres ownership on copies concentrates capital around catalogues and feeds, and leaves the live act exposed to every cost pressure.^[1]

Two economic facts support the inversion. Live performance is a high-cost, low-scalability craft, the pattern Baumol described, and platforms have pushed recorded music toward commodity margins, with a near-zero price for each additional listen.^{[1] [18]} Where one side of the market cannot be scaled and the other cannot be priced, price discovery has to move to where the scarce thing happens. The essays put it plainly: value discovery belongs on the bandstand, not only in record stores and feeds.^[1]

What this does not say. It does not say recordings have no value. The recording is the archive; it stays available and it matters. It does not say copies should be free or that artists should not own their recordings. It says the performance is a separate asset that has been unpriced, and that the people who make it should hold the receipt for it.

9The mechanism: how a night becomes a record

9.1 The problem: dates held by landlords

Most proof of creative work today is held by the platform it was published on. A post's date is a row in someone else's database; when the account goes, the work and its chronology go together.^[5] The author of the Proof of Presence paper describes losing fifteen years of public work, and the dates that proved it, to two platforms.^[5] Three properties are missing from that arrangement: the creator should hold the evidence, anyone should be able to check it, and once recorded it should be impossible to rewrite quietly.^[5]

9.2 Layer one: fingerprint and timestamp

Each artifact (an essay, a repository snapshot, a recording, a manifest) is reduced to a SHA-256 digest. The digest reveals nothing about the content and changes completely if one byte changes. The digest is submitted to OpenTimestamps, which aggregates many digests into a Merkle tree and commits the root to a Bitcoin transaction. The resulting proof links the artifact to a specific block.^{[5] [9]} Public calendars absorb the fee, so the cost to the creator is zero.^[5]

What it proves, exactly. That the artifact existed no later than the block. It does not prove when the artifact was first created, who made it, or that its contents are true.^[5] A receipt system is only credible if it says this.

9.3 Layer two: the sequenced ledger

A timestamp proves one thing existed. A ledger proves an order of things. The Department's proof ledger is an append-only list. Each entry carries a sequence number, a date (Eastern), the artifact, its fingerprint, the proof file and block, and one sentence on what the entry does and does not prove.^{[5] [6]} Because each new state of the ledger can itself be fingerprinted and anchored, the history is fixed as it grows: an entry cannot be inserted before an earlier one without breaking an anchored digest.^[5] +1 Entries so far:

Check, independently of the Department: block 970577 was mined at 03:34 UTC on 2026-10-09, which is 11:34 pm Eastern on Oct 8, and block 970644 at 14:31 UTC on 2026-10-09.^{[20] [21]} Rule for repositories going public: never rewrite history; secrets found in history are rotated, not scrubbed.^[5]

9.4 Layer three: authenticated editions of live performance

The third layer applies the same receipt to the night itself; it is the subject of section 13. 0

9.5 Why signed content is not enough

The industry's main answer to the flood of synthetic media is content credentials, in which cameras and phones sign media at capture.^{[5] [10]} Its structural weakness is that platforms strip the metadata on upload and transcoding, so the signature rarely survives to the viewer.^[5] A ledger anchor complements it: the signature says this device made this file, and the anchor says this file existed by this block, with a proof that lives outside every platform. The design uses both.^[5]

9.6 How a night becomes a record

Put together, the layers give a chain that runs from an event to a standing. Steps 1 to 6 are the method already in use for the Department's own work; steps 2 to 4 for live performances are designed and not yet built. 0

10Why a chain suits presence

The essay defines presence as an act that happens once, in time, before witnesses, and cannot be taken back. A confirmed transaction on a public chain has the same four properties.^[5]

Bitcoin's own paper begins here: "The solution we propose begins with a timestamp server," which works by "taking a hash of a block of items to be timestamped and widely publishing the hash," with each timestamp including the previous one, "forming a chain."^[28] The Department's ledger is that mechanism applied to performances, and it uses Bitcoin itself as the clock. It does not compete with Bitcoin; it relies on it.

This is why a ledger can serve as a register of commitments the way parish registers once served for baptisms and marriages. In the paper's own words: "The value of web3 for culture is not the token. It is the timestamp, and the order."^[5]

11The protocol

State: the ledger and the anchoring are in use for the Department's own work +1. Manifests, witness signatures and editions for live performances are specified here and not yet built 0.

11.1 Definitions

• Performance. A set played by named players in one place over one continuous interval of time.
• Manifest. A JSON document that describes one performance (fields below). It is serialised with the JSON Canonicalization Scheme^[33] and hashed with SHA-256. The hash is the manifest's name.
• Witness signature. A signature over the manifest hash by a credited player, or by the venue, with a key listed in the manifest. Ed25519 is proposed.
• Anchor. An OpenTimestamps proof^[9] that links a hash to a Bitcoin block header.
• Edition. A token that names a manifest hash and a fixed maximum count. One-of-ones are the simplest case. ERC-721 is proposed for one-of-ones and ERC-1155 for small runs.
• Ledger. An append-only list of entries. Entry i contains the hash of entry i minus 1. Its head hash is anchored periodically.^{[5] [6]}

11.2 The manifest

An example, with placeholder values. It is not a real performance.

{
  "version": "doj-manifest/0.1",
  "event":   {"date": "2026-11-14T21:00:00-05:00", "venue": "Example Room", "city": "New York"},
  "players": [{"name": "Alias One", "instrument": "drums", "key": "ed25519:<public key>"}, ...],
  "setlist": [{"title": "Example Tune", "composer": "original", "start": "21:04", "end": "21:15"}],
  "media":   [{"file": "drums.wav", "sha256": "<hash>", "role": "stem"}, ...],
  "media_root": "<sha256 Merkle root over the sorted media hashes>",
  "capture": {"device": "<model>", "c2pa": true},
  "splits_bps": {"Alias One": 2500, ...},        // integers; the sum must equal 10000
  "terms_sha256": "<hash of the edition terms>",
  "prev": "<sha256 of the previous ledger entry>"
}

11.3 Procedures

1. Record. Capture the raw multitrack files and keep them unaltered.
2. Describe. Build the manifest, then compute the hash of every media file and the Merkle root.
3. Attest. Every credited player signs the manifest hash. An edition is not issued without all of them.
4. Anchor. Stamp the manifest hash and append it to the ledger.
5. Issue. Mint the edition against the manifest hash, with its maximum count fixed at issue.
6. Settle. A splitter contract pays sale proceeds according to splits_bps. A splitter contract already exists in the JazzCats code.

11.4 Verification

Given a manifest M, its signatures, an OpenTimestamps proof and an edition token, a verifier does the following, with no account and no trust in the Department:

1. Canonicalise M, hash it, and compare with the hash in the token and the ledger entry.
2. Hash each media file, rebuild the Merkle root, and compare with media_root.
3. Verify every signature over the manifest hash against the keys in M.
4. Verify the OpenTimestamps proof to a Bitcoin block header and read its time T.
5. Follow the hash chain from the entry to a later anchored head.
6. Check that splits_bps sums to 10,000 and that the token's splitter pays that table.

The verifier learns that M existed no later than T; that each listed key signed it; that the files with those hashes are the ones described; and that the edition routes value as stated. The verifier does not learn that the players performed live, that the files are unprocessed capture, or that a signer is the person they claim to be.

11.5 Invariants

• I1. A manifest is immutable once anchored: any change changes its hash.
• I2. The ledger is append-only: any edit to an earlier entry breaks every later hash.
• I3. Splits are integers that sum to 10,000.
• I4. An edition's maximum count is fixed when it is issued.
• I5. A manifest hash appears at most once in the ledger.

12Threat model and security properties

The protocol is meant to be attacked. This table lists the attacks the Department knows about, the defence in the design, and what is left over.

13The market for performance

State: designed, not built. 0 This section describes the design; it does not describe a market that exists.

13.1 The edition

1. The event. A specific performance: date, venue, band, set. Its existence is witnessed by the room and recorded.^[5]
2. The anchor. At the end of the night a manifest is fingerprinted and anchored: setlist, personnel, start and end times, and the hashes of the raw multitrack files.^[5]
3. The edition. A fixed number of editions, in the simplest case one, each linking to the anchored manifest.^[5]
4. The split. Revenue is divided by contract among the players credited in the manifest, so the receipt that proves the night also routes its value.^[5] The Department takes a share, and members who help get the night heard can share in it. The shares are not yet set.
5. The archive. The recording stays available to hear. Owning an edition means owning a verifiable piece of the night, not exclusive access to the sound.^[5]

13.2 What the buyer holds, and what the player keeps

The buyer holds that night's edition. The player keeps their music. An edition is a receipt for a night, not a transfer of the composition or the master, and the rights that come with each edition are written down with it. A token does not move copyright by itself, and the design does not pretend it does.

13.3 Auctions with reasons, not rankings

The essays call for auctions "with reasons not rankings," and archives with memory, not churn.^[1] Selling the night after it has happened has a structural advantage over the older model of funding an artist first and hoping: nobody bears development risk for work that does not yet exist. It has a structural weakness too. A single auction with few bidders prices low. A disclosed reserve, funded by a sponsor, and an audience that is already in the room are the obvious protections. Both are proposals, not features.

13.4 Rights and services, unbundled

The rights stay with the player. The services around a performance (marketing, production, teaching, management) are separate work that is bought openly, and where possible paid on outcome. The earlier institutions built by musicians point the same way: Strata-East separated the artist's ownership from limited administrative services.^[17] Bundling the two is what lets one party hold the ledger. The logic is the one Teece described: who captures the value of an innovation depends on who controls the complementary assets around it.^[35]

13.5 Predictions that can fail

An economist should be able to reject this design. Each prediction below has a measure and a failure condition. Thresholds are fixed and published before the first sale, and the results are published whatever they show.

13.6 Legal note

An edition that promises profit from others' efforts can be a security. Fractional or revenue-sharing editions are not offered until counsel has reviewed their terms, and no edition is offered before its terms are reviewed. A plain collectible, with one work, one record and no promised return, is the starting point.^[5]

14On-chain finance: who captures the value

Ownership and money. A chain does two things for an artist. It lets them hold the record of their work, so that ownership is a fact anyone can check. And it makes culture liquid: a following, a meme, a work or a night on the bandstand can be priced by anyone, at any hour, with no gatekeeper in between. The second effect is often called hyperfinancialization. For most of the twentieth century the value jazz produced was captured by whoever held the master and the pipe: labels, publishers and distributors. This paper treats that as a design problem. The question is where the value lands.

How attention becomes price. Herbert Simon observed that a wealth of information creates a poverty of attention. Dawkins named the unit of cultural transmission and Blackmore gave it selection criteria. Chains turn attention into price through automated market makers and exchange listings; the Department's paper on memes and markets sets out the mechanism.^[42] The signal is already visible in ordinary retail finance: when Robinhood reported its second quarter of 2021, Dogecoin was 62 percent of its crypto transaction revenue, from crypto revenue of $233 million.^[55]

What the Department does with it. It writes the split into the contract at the time of the night, credits the players in the manifest, and keeps the record with the player. A work or an edition is then a claim on a specific, checkable thing. The collectibles run on Robinhood Chain, where people already trade, and the Department's currency, $JAZZ, is meant to be used inside the institution and not held as a bet.

Honest limits. Markets take a cut: fees, slippage and fast money are part of every venue. A price is not a promise, and nothing here is a forecast of one. Creator royalties on resale are advisory in the standard (ERC-2981 reports a royalty; it does not force one), and some marketplaces have made them optional, so the paper does not rely on them. And in the first release, the works mint pays the Department's treasury, not the musicians. Performance editions, where the split is written among the players of a night, are the mechanism that pays musicians, and they are not yet built (section 13).

The argument in one line. The people who built jazz are not the labels and infrastructure providers who were paid for it. A chain is the first infrastructure in a century that can pay the players directly, if the contract is written to do so.

15What the sciences say, and what they do not

The Department's essays make claims about brains and bodies. Some are supported by published work, one rests on a contested theory, and most are hypotheses. They are kept apart here.

15.1 Established, with limits

• In a study of six professional jazz pianists, improvising, compared with playing an over-learned sequence, was associated with deactivation of dorsolateral prefrontal and lateral orbital cortex and activation of medial prefrontal cortex. The authors read this as behaviour without the usual central self-monitoring.^[29] The sample is small, and the finding concerns pianists in a scanner.
• In a study of eleven singers and a conductor, respiration and heart-rate variability synchronised more during singing than at rest, and more in unison singing than in a part song or canon.^[30]

15.2 Contested

The Department's essay on the nervous system builds on the polyvagal theory.^[3] That theory is disputed in the physiological literature: critics argue that respiratory sinus arrhythmia is not a direct measure of vagal tone, and a 2025 expert evaluation concluded the theory is untenable; its originator has replied.^{[31] [32]} This paper does not rely on it. The measurements proposed below are heart-rate and respiration coupling, which are observable whether or not the theory is true.

15.3 Hypotheses

Each is to be pre-registered before data are collected, with thresholds fixed in advance, and the results published whatever they show.

• H-S1. Heart-rate-variability and respiration coupling between players is higher when a quartet improvises on a form than when the same quartet plays a composed chart on the same form. Design: within-group crossover, wearable sensors, phase-synchronisation analysis as in the choir study.^[30]
• H-S2. Coupling between players and a live audience is higher than coupling between the same listeners and a recording of that performance. If there is no difference, the claim that presence is a distinct biological good is weakened, and the case for editions rests on provenance and scarcity alone.
• H-S3. The neural signature of swing, as distinct from timing accuracy, can be separated with EEG or fMRI in trained players. This is the Department's first research question.

16The art: the cats, the passport and the permit

JazzCats is the art, and it is the same mechanism applied to a collection: a record kept on chain by those who made it, checkable by anyone. +1 built and verified; the mint has not opened.

• 5,678 cats. Each is a musician with its own song. The art is drawn from the chain and fixed at launch.^[22]
• Every cat was rebuilt and checked against its own recipe: all 5,678 slots pass every check against the committed root 0x40eb…922c. The suite of 211 contract tests and the contract size check pass.
• A full lifecycle was run on the real Robinhood Chain test network: a public mint (transaction), the owner closing the mint (transaction), the shuffle, and the cat's art published with its Merkle proof (transaction). The token then reads back with its traits. The contract is at 0x4aa75619…e55bd0.
• Each cat carries a record on chain in the ERC-8048 form, including the address where an agent answers for it, and a statement that the record holds no spending authority.^[11]

16.1 Costs, sizes and the reveal

Measured on the Robinhood Chain test network on 2026-11-01, in gas units, for one cat. +1

The reveal is a commit-then-reveal with a delay. After a sell-out, or an owner close, a 24-hour delay applies. The owner may move the reveal time anywhere between now and seven days after arming, and anyone may close a mint that has been open for 14 days, so the reveal cannot stall. A lock then commits to a native block a few blocks ahead, and finalising reads that block's hash through the chain's ArbSys precompile and derives the offset as keccak256(hash, root, contract) modulo 5,678. If the hash is unavailable, the lock clears and can be repeated. The known weakness is that block ordering on this chain is controlled by a sequencer.

16.2 The passport and the permit

Agent identity standards are still drafts: ERC-8004 for agents, ERC-8217 for binding an agent to an NFT, and ERC-8183 for job escrow between a client, a provider and an evaluator.^{[12] [13] [14]} The design uses them as they stabilise. A gig maps onto the job standard: a club locks a budget, the band performs, an evaluator decides whether the work was done, and an expired job refunds. 0 The permits that let an agent act for a holder (limited to seven days and 1,024 actions, unable to spend, ended by a sale) are written and tested locally; they are not on mainnet.

16.3 Care, pace and levels

The game layer is designed: a cat's vitals computed from timestamps, three paces from daily care to weekly, experience and levels that unlock access and not yield. -1 The contract is written and has not been deployed.

16.4 The works

The front door offers a second kind of art: generative works, each drawn from a 256-bit seed. The seed fixes the palette, the textures and the composition, and every work spells JAZZ in its own hand, so the possible works number in the billions upon billions. The picture on screen is the one minted: the seed is sent in the mint, the contract records it, and the work is redrawn from that seed alone by code whose hash is pinned in the contract. A seed can be minted once, so a minted work cannot be repeated. A work that is not minted is gone when the page closes. 0 The contract is written and tested (13 tests) and has not been deployed. The price is 0.1 ETH, payable in ETH or in $JAZZ at a rate that keeps it at 0.1 ETH, and any holder is a Patron of the Department. The Patron role is read from the chain, so no list is kept.

17The original $JAZZ notes (2024)

$JAZZ began as a set of notes in 2024 and is kept here as history. Nothing in this section is offered or planned as written. It is the original thinking, set beside what the design says now, so a reader can see what changed and why.

Where it came from. The notes say the idea was born in the 2021 NFT run, from a founder who was a member of the CyberKongz community, and that it was put on hold as the market slowed and the community went quiet.^[41] The Department kept building programs, and the notes later returned to the idea after Thelonious Punk was deployed.

What the notes proposed. A community of artists, builders and patrons; features gated by holding the coin; governance by proposals that artists endorse; a jazz festival; a reputation-based freelancer marketplace with a 1 percent network fee shared with stakers; an AI launchpad where burning the coin generated an AI jazz musician; access to the Modern Jazz Institute; and buybacks funded by revenue.^[41]

The original allocation, for the record. One billion coins were to be minted:

The shares sum to 100 percent. The notes also said buybacks and burns would raise the coin's value. This paper makes no such claim and the current design does not depend on one.

What changed. The original notes were a token-first design: a supply, an allocation and a promise of governance and buybacks. The current design is use-first. The coin is the currency inside the Department: it pays musicians, buys lessons, cares for cats and mints works, and its price in works is pegged to 0.1 ETH through a keeper-set rate that moves at most 10 percent an hour.^[41] Holding a work makes the holder a Patron of the Department. Any token design is reviewed by counsel before launch, and none is offered by this paper.

18The currency: $JAZZ

State: not launched. -1 The plan is to launch $JAZZ on Robinhood Chain, which has been live on mainnet since July 1, 2026 and is built on the Arbitrum stack.^[26]

$JAZZ is the currency of the Department. It is meant to be used inside it: to pay a musician, buy a lesson, care for a cat, take a gig, hold a licence. Progress, levels and standing are worth something in the Department whatever the coin trades at. This paper does not describe supply, price or distribution, and it makes no promise about either.

19The institution

The fellowship. A fellowship that cuts across silos of academia and industry: drummers and neuroscientists on the same problems, saxophonists and systems engineers designing exercises that extend what a player can do, critics and cryptographers building reputation that cannot be gamed.^[1] A letter seeking one institutional partner to host the first residency was published in September 2025.^[8] -1

The research agenda. Five questions that academia will not fund and industry will not ask:^[1]

1. What is the neural basis of swing, as distinct from timing accuracy?
2. How does improvisation encode information, and how much entropy is best?
3. What are the economics of excellence: which funding structures support innovation and which suppress it?
4. How can AI augment human creativity without replacing it, tested by experiment?
5. What does collective intelligence look like in practice in an ensemble that decides without hierarchy?

Education, both ways. Technologists learn to improvise: to listen, to take risks in public, to make irreversible decisions under constraint. Musicians learn code and capital: to read the systems that already shape what is heard, and to found and govern.^[1]

The stack. The Department refuses what the essays call the control stack: automated gatekeeping of what may be heard, pooled platform power, optimisation toward no end. It builds a sovereign one, in which those who ascend through the music ascend the institution. AI is treated as a microscope, a way to see what ears and institutions have not resolved, and not as a substitute for the player.^[1]

20Agents and receipts

Agents act in discrete steps, so every step can be logged. The design rule is: no action without an ask, no ask without a receipt.^[5] An agent owned by a person should log every action it takes for its principal, in order, to a ledger the principal controls; anchor that log periodically so the principal can prove what was done in their name; and refuse actions it cannot record.^[5] That is what makes an agent safe to own: not that it never errs, but that every act is ordered, checkable and attributable.

The Department applies the rule to its own agents. Their papers are posted unedited with the commit identifier, the file's git blob and its SHA-256, and dated to the original commit; the Confidence Score paper, for example, is dated April 21, 2026, 10:05 AM ET, commit 290bf09.^[7] The 83 field notes in the public repository carry the same provenance.^[24] They are field notes from a running system, not claims about the world.

21What exists today

Each line carries its state: -1 planned, 0 being built, +1 done and checkable.

22Limits and risks

• A timestamp proves existence by a date, not authorship or truth. Editor history and local files are self-recorded; they support claims, and third-party records (GitHub, public chains, archives) carry them.^[5]
• Public chains are permanent. The ledger anchors fingerprints, never content, because anything anchored cannot be withdrawn.^[5]
• Editions carry legal exposure that depends on their terms (section 13.6).^[5]
• Thin markets. A single night's auction can attract few bidders and price low. The reserve and the audience are proposals, not guarantees.
• The standards are drafts. ERC-8048, 8004, 8183 and 8217 are all drafts and may change.^{[11] [12] [13] [14]}
• Unaudited code. The contracts have been tested extensively and have not been independently audited. The collection's reveal depends on a block hash chosen after a delay, on a chain whose block ordering is controlled by a sequencer.
• Arguments, not measurements. The claims about nervous systems and swing are the Department's arguments and its research agenda, not established results.^[3]
• Not finished. The mint has not opened, the editions are designed, and $JAZZ has not launched.

23Claims register

Every claim in the paper is listed once, with its type, its state, its evidence and a way to show it wrong. A claim that has no way to be shown wrong is marked as an argument or a forecast, and is not counted as evidence.

24How to check this paper

Everything here can be checked without trusting the Department.

# the Bitcoin blocks that anchor the ledger (open in any block explorer)
https://mempool.space/block/970577      mined 2026-10-09 03:34 UTC
https://mempool.space/block/970644      mined 2026-10-09 14:31 UTC

# the testnet contract: supply should read 1 (one cat, minted, shuffled, revealed)
cast call 0x4aa75619aa0906959cd780b345ae3c6c42e55bd0 "totalSupply()(uint256)" \
  --rpc-url https://rpc.testnet.chain.robinhood.com

# the fingerprint of any artifact must match its ledger entry
shasum -a 256 <file>
ots verify <file>.ots

The texts this paper cites are fingerprinted below, as retrieved on 2026-11-01. A fingerprint of the extracted text, not of the web page, so a different extraction can differ in whitespace.

The SHA-256 of this page as published is in index.html.sha256. Its fingerprint is to be added to the proof ledger on publication.^[5]

References

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2. Post Semantics. the Department of Jazz, 2025-09-11. departmentofjazz.substack.com/p/post-semanticism
3. The Polyvagal Theorem, Jazz, and Cultural Infrastructure. the Department of Jazz, 2025-09-19. departmentofjazz.substack.com/p/the-polyvagal-theorem-jazz-and-cultural
4. Symbols, Cymbals, and Pretense. the Department of Jazz, 2026-10-10. departmentofjazz.substack.com/p/symbols-cymbals-and-pretense
5. Proof of Presence. the Department of Jazz, 2026-10-10. departmentofjazz.substack.com/p/proof-of-presence
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7. Paper 050: The Confidence Score Doctrine, posted unedited with its commit. the Department of Jazz, committed 2026-04-21. departmentofjazz.substack.com/p/paper-050-the-confidence-score-doctrine
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10. C2PA, the Coalition for Content Provenance and Authenticity. c2pa.org. c2pa.org
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34. Salganik, Dodds and Watts, Experimental study of inequality and unpredictability in an artificial cultural market. Science, 2006. 14,341 participants. pubmed.ncbi.nlm.nih.gov/16469928/
35. Teece, Profiting from technological innovation: implications for integration, collaboration, licensing and public policy. Research Policy, 1986. doi.org/10.1016/0048-7333(86)90027-2
36. The Musical Offering (Bach, 1747): Bach improvises a three-voice fugue on a theme given by Frederick the Great at Potsdam. Wikipedia, citing Forkel and Bach family sources. en.wikipedia.org/wiki/The_Musical_Offering
37. Cadenza: a passage improvised or written out for the soloist, with Mozart concerto cadenzas as the standard examples. Wikipedia. en.wikipedia.org/wiki/Cadenza
38. Children's Corner (Debussy, 1908), including Golliwogg's Cakewalk. Wikipedia. en.wikipedia.org/wiki/Children%27s_Corner
39. Ebony Concerto (Stravinsky), written for Woody Herman and his band, 1945. Wikipedia. en.wikipedia.org/wiki/Ebony_Concerto_(Stravinsky)
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43. No Neutral Posture: The Only Three Moves for Serious Artists in the Algorithmic Age. the Department of Jazz, Paragraph. paragraph.com/@the-department-of-jazz/no-neutral-posture-the-only-three-moves-for-serious-
44. Case Study: InTheShed.Live (the owner's own account: built in 2022, results at 30, 45 and 90 days, partners, guests). Notion page created 2024-09-26. shedding.notion.site/10daf7d31e8581e98d1bc81f7c3c0874
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47. Simon Reynolds, Renegade Academia: the Cybernetic Culture Research Unit (the unit drew energy from jungle, a/k/a drum and bass). Energy Flash blog, Nov 2009, reprinting a 1998 piece. energyflashbysimonreynolds.blogspot.com/2009/11/renegade-academia-cybernetic-culture.html
48. Amen break: the seven-second drum break by Gregory Coleman on "Amen, Brother" (The Winstons, 1969); a staple of jungle and drum and bass; the Winstons received no royalties; Coleman died homeless and destitute in 2006. Wikipedia. en.wikipedia.org/wiki/Amen_break
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