100 Physical Coins Built with Digital Matter Theory

The first Digital Matter Theory collection tied to a physical collectible. Each coin holds 100M DMT-NAT, 1 DMT-CENT UNAT and 1 DMT-CENT NAT, controlled by a private key sealed onto the back of the coin.

Every coin ships with a hand-numbered, signed certificate of authenticity.

In 2011–2013, Mike Caldwell created Casascius coins: physical coins sealed with the Bitcoin private key of an address holding bitcoin.

In 2023, The Block Runner (Will and Iman) created Digital Matter Theory, a standard for creating fungible and non-fungible tokens on Bitcoin whose supply is determined by patterns in Bitcoin’s own data.

DMT-CENT merges the two ideas into one. Sealed onto the back of every DMT-CENT coin is a private key. It controls a Bitcoin address holding Digital Matter Theory assets.

Every coin holds 100M DMT-NAT. DMT-NAT is the first Non-Arbitrary Token designed to be generated with every Bitcoin block and distributed directly to Bitcoin miners as an additional subsidy reward.

Every DMT-CENT holds a rare sat carrying two inscriptions. The first is the DMT-CENT UNAT. The second is the 3D artwork, a 1:1 replica of the physical coin. This is the first DMT collection fully inscribed on rare sats.

Every coin holds 1 DMT-CENT NAT. This is the fungible token minted alongside the UNAT, from the dual-token nature of Digital Matter Theory mints.

Digital Matter Theory defines a collection’s supply with an element: a pattern that decides which Bitcoin blocks produce valid mints. DMT-CENT uses the centum element, which matches only block heights 1 through 100, exactly. The first DMT collection with a permanently non-expansionary supply.

The deploy inscription was also used as a parent for the entire collection. Over three days, every single DMT-CENT mint was inscribed one by one as a child of the deploy inscription — in order, DMT-CENT #1 through DMT-CENT #100. The first DMT collection minted in sequence. Anyone can confirm it: the children of the deploy inscription are listed in the order they were inscribed. To follow the current ordinals standard, the deploy inscription was then burned to seal the collection.

Over four days, every DMT-CENT mint was then re-inscribed with the 3D art, which renders in ordinals explorers. The 3D art is what makes this the first UNAT collection viewable in any Bitcoin ordinals explorer.

Every DMT mint is a dual token mint: one UNAT and one NAT. Each coin holds both halves of its own mint, along with 100M DMT-NAT.

A UNAT on its own is JSON text, which most explorers render as a blob of code. Reinscribing a 3D artwork onto the same rare sat as the UNAT gives it a body. The mint and its art share one UTXO, so they can never be separated, and the 3D art makes it visible in ordinals explorers.

The two token balances are account-based tokens using TAP protocol, a Bitcoin meta protocol. These tokens require ordinal inscriptions to transfer balances.

TAP Wallet is the wallet to use for redeeming: it is the only one that displays all three assets and can move them. The redemption guide covers the steps.

Every DMT-CENT mint is inscribed on a rare sat, making this the first DMT collection fully inscribed on rare sats. The rare sats were chosen to give the collection more meaning.

The centum pattern gives every coin exactly one trait: a Bitcoin block height. The sats were chosen to make those block heights mean something.

DMT-CENT #9 is minted from block 9 and inscribed on a sat mined in block 9. DMT-CENT #78 is minted from block 78 and inscribed on a sat mined in block 78. These are the only two coins whose sat was mined in the same block their mint comes from.

DMT-CENT #1, the opener, sits on an uncommon: the first sat of a block. The nine palindromic numbers sit on palindrome sats, whose own serial numbers read the same in both directions. DMT-CENT #100, the closer, sits on a black uncommon: the last sat of a block.

The other 87 are vintage sats from Bitcoin’s first 1,000 blocks. Like the centum mints themselves, which come from blocks 1 through 100, they belong to Bitcoin’s earliest blocks.

The key is attached to the underside of the coin’s tamper evident seal. Peel the seal and the key lifts away with it, exposing the engraving beneath: the DMT-CENT # across the top, an image in the centre, and an edition number across the bottom.

Eight images, from four communities in the DMT ecosystem, each in a rare and a common variant.

One engraving per coin. The scarcest are the three rare /5 images: fifteen coins. Engraving rarity is completely independent of sat rarity, so every coin carries two separate rarity traits, and a common vintage sat coin can hide one of the rarest engravings.

The engraving is hidden twice. Look at a sealed coin’s art in an ordinals explorer and you will see the back of the coin with the holographic seal. Once the coin’s sat leaves the coin’s address, the art peels its own seal and shows that coin’s engraving in the 3D art.

The seal and the engraving live in your hand. The art and the checker live on Bitcoin. Peeling the seal changes nothing on-chain; only sending something from the address does. The art follows the sat, while the checker looks for any spend from the address at all.

Importing the private key and moving the sat is the walk from the top row to the bottom: peel the seal, import the key into TAP Wallet, and move the sat and both token balances to your own wallet. It is permanent, so follow the redemption guide at dmtcent.com exactly.

Every key is 256 bits drawn from the operating system’s cryptographic random source: one of roughly 1.16 × 10⁷⁷ equally likely possibilities. That is the standard 128-bit security of every Bitcoin key. A computer doing a trillion operations a second since the Big Bang would be about a billionth of the way to breaking one.

The addresses are standard Taproot addresses, and the derivation has been independently verified against Bitcoin’s official test vectors and a separate open-source Bitcoin library.

Keys were generated on an air-gapped machine running Tails, an operating system that lives entirely in memory and forgets everything on shutdown. The generator was run in that memory, and the keys it produced were never written to a disk of any kind. The machine was cabled directly to a monochrome laser printer, and the keys were printed immediately on waterproof synthetic sheets. The printed sheets, now sealed onto the coins, are the only copies of these keys that have ever existed.

No backups exist anywhere. Once a coin is sealed, nobody — including the creator — can touch what is on it. Only the coin holder can access the contents, by peeling the seal to reveal the private key holding the assets.

Every coin’s number, address and sat can be found at dmtcent.com. Paste any address into Tapalytics or Ordinals Wallet to verify holdings yourself.

One page does both checks. Every coin is listed with its address and whether anything has ever been spent from it — each coin address has only ever received assets, so any spend from one means that coin has moved.

The same page checks authenticity. Enter the address from the slab’s label and the serial from its seal, and it tells you whether the pair matches a genuine coin.

Each coin also ships with a hand-numbered, signed certificate of authenticity matching its coin number. Treat it as provenance, not proof: certificates can be copied, so the checker and the tamper evident seal are what actually verify a coin.

The 3D art is rendered with a fully on-chain generative script and is visible in ordinals explorers as a reinscription on the same sat as the DMT-CENT mint inscription. Every coin’s 3D art can also be seen on dmtcent.com, from local copies of the code inscribed on Bitcoin.

No bitcoin was put on the coins. Each coin carries its rare sat with two inscriptions, 1 DMT-CENT NAT, and 100,000,000 DMT-NAT.

The token balances only show in TAP-aware tools such as TAP Wallet, Tapalytics or Ordinals Wallet. Other wallets and ordinals explorers do not display them.

The art shows where the sat is now. It is revealed while the sat is anywhere other than the coin’s address. If a sat were ever sent back to that exact address, explorers would show the seal again.

A lost coin is gone for good. No backups means no recovery, by us or by anyone.

Redeeming is permanent. Follow the redemption guide exactly.

Yes. The generative art script is inscribed on-chain. It renders in ordinals explorers.

No. Each coin carries its rare sat with two inscriptions, 1 DMT-CENT NAT, and 100,000,000 DMT-NAT.

No. The only copy of the key is under your seal.

Nothing on your coin depends on it. The sat, its inscriptions, the token balances and the art all live on Bitcoin, and the key is under your seal. The site is a convenience for checking coins and reading instructions.

Check the address and seal serial with the checker, inspect the tamper seal, and for secondary sales only exchange serials in person, at handover.

None, to own a sealed coin. To redeem you need TAP Wallet: it is the only wallet that displays all three assets and can move them. The redemption guide covers the steps.