Highlights

• For years, industry experts have struggled to design a physical bitcoin minting model that secures bitcoin on-chain without exposing it to theft by manufacturers, hackers, or regulatory choke holds.
• With The Bitcoin Mint Protocol, you can now—for the first time in blockchain history—independently mint real bitcoin that you can hold in your hands and independently verify.
• It works by leveraging nature’s cryptography to permanently translate and define Bitcoin’s otherwise undefined digital asset on-chain as a naturally unique, non-counterfeitable material object in the physical world.
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What Is Real Physical Bitcoin?

Physical bitcoin traditionally refers to a tangible coin or token that carries tamper-proof access to a funded Bitcoin address. These coins aren’t literally physical bitcoin. They are more like security box keys that let you move bitcoin from one digital box to the other. It’s not the same as taking bitcoin out of its cash box and holding it in your hands.

In contrast, The Bitcoin Mint defines real physical bitcoin as bitcoin cited on its blockchain that you can see, feel and prove has no other definition or keys to digitally transfer said bitcoin to another owner.

Making bitcoin really physical is like taking cash out of an ATM. The 100 dollar bill you take out of your account is forever that 100 dollar bill. If and when that bill gets deposited back into the bank, it doesn’t stop being a 100 dollar bill. And so similarly, any bitcoin made really physical stays physical.

The impulse to make bitcoin real—something you can see and hold—has always been deeply embedded in human psychology. In the early days of Bitcoin, the forums were full of discussions exploring this possibility. For example, on August 6, 2010, Gavin Andresen first proposed the idea of “printing bitcoins” in a BitcoinTalk post. Then, on December 30, 2010, a user responded to that thread with the first recorded attempt at a “real” bitcoin made of copper and epoxy. Despite lacking any actual connection to the Bitcoin blockchain, the creation sparked a flurry of design experiments and physical prototypes.

This parallel track in Bitcoin’s history not only produced a vibrant ecosystem of physical bitcoin collectibles, it also set Bitcoin on a turbulent journey toward being perceived and used as real money.

By 2013, demand for the first-ever physical Bitcoin coins with tamper-proof access to addresses on chain went parabolic. Sales more than doubled as Bitcoin’s price skyrocketed from $3 to $1,163 in just ten months.

But in November 2013, this historic run came to a sudden halt after the creator, Mike Caldwell, received a letter from the Financial Crimes Enforcement Network (FinCEN) claiming that he was operating an unregistered money-transmitting business. After announcing the suspension of sales, physical Bitcoin never saw that kind of viral adoption again.

The meteoric rise and fall of Caldwell’s Casascius coins is a fascinating story about the power of physical iconography—and its perceived threat to state monetary authority. The state’s pattern of intervention reveals that the state and public doesn’t consider bitcoin private money until you can see, hold and exchange it outside the control and oversight of any authority.

But it also reveals critical philosophical and strategic flaws in their design. As popular as these coins were, they were never a true incarnation of the digital asset itself. Their dependence on a central manufacturer proved to be an insurmountable liability.

Learn why in our next article: Making Bitcoin Money—The History of Physical Bitcoin

The story of real physical bitcoin is radically different from Caldwell’s Casascius Coins. Unlike his creation, the real thing is a product of nature. Its natural occurrence, as you will see, is what makes this bitcoin real where Caldwell’s coins were not.

Where to Find Real Bitcoin

Contrary to popular opinion, bitcoin doesn’t actually exist in each unspent transaction of the blockchain. You can’t find it there like you would a pot of gold. The blockchain is simply a distributed ledger that tracks the location of 2.1 quadrillion units of an asset called bitcoin.

No accounting units exist on a ledger. If they represent something physical like gold, they exist somewhere in the material world. And if they represent something imaginary like D&D gold, they exist in the shared imagination of participants.

But unlike traditional or imaginary ledgers, both the location and asset in the Bitcoin ledger are undefined. There is nothing that clarifies what they are or what their location corresponds to.

This lack of physical or imaginary representation doesn’t mean it doesn’t or can’t exist. It simply means that its unique identity, visual form and nature is a mystery waiting to be revealed. Another way to put it is, the identity of each bit of bitcoin is hidden at a temporary undisclosed location marked to the blockchain. And nowhere in this accounting record does it rule out the possibility of that location being in the physical world.

This open ended potential means that it is possible to reveal bitcoin as something you can see and hold. You only need to find and give it a naturally unique visual destination that prevents it from being seen and used as anything else.

The Bitcoin Mint

The Bitcoin Mint is a public protocol that facilitates and coordinates this type of physical bitcoin revelation on-chain. It generates receive-only bitcoin addresses derived from visual patterns and is immutably archived to the blockchain for anyone to verify real physical bitcoin with.

Put another way, The Bitcoin Mint is a proof-of-definition protocol that proves no one can ever reveal the bits of bitcoin at a BTC mint address as anything but the material it’s contrived from or transfer them to a different location on the blockchain.

How it works

For anyone unfamiliar with the process, all digital bitcoin transactions require signatures that prove that the sender owns a valid private/public key pair from which the sending address was derived. Without the valid keys, it is impossible to send bitcoin to any other addresses.

The Bitcoin Mint protocol contrives addresses from natural patterns using sift edge detection software instead of these cryptographic keys. It first translates the visual pattern of something like woodgrain into numeric coordinates called a feature vector and then uses the sha256 algorithm to hash that vector into an address that can receive bitcoin. This vector, unlike the public/private key pair, can’t be used to authorize a transaction—making the address verifiably unspendable. The lack of private/public key also makes the addresses quantum resistant. No computer can find a key that doesn’t exist.

However, to be considered Real Physical Bitcoin, the visual pattern these addresses are derived from must be naturally unique. If it’s artificially contrived from something plastic or mechanical, then there is no way for people to know if they are holding the original material revealed in the bitcoin address.

The natural uniqueness of something like woodgrain doesn’t just secure bitcoin from counterfeiting. It preserves the asset as a commodity by anchoring its definition to something discovered in the natural world.

But unlike other commodities, its value as a medium of exchange doesn’t come from the material itself. It comes from its inherent compatibility with the cryptographic laws of the bitcoin consensus mechanism. On a profound level, its revelation pulls down the veil separating blockchain and the natural world to show a natural cryptographic through-line and compatibility that has always existed.

Exchanging Real Physical Bitcoin

This address generation pipeline is immutably preserved on-chain in an ordinal inscription titled the “Minting Standard.” Anyone who is given real physical bitcoin created with this standard, can see this proof of definition for themselves. They just need to run the visual pattern through the same program to see if it generates the same address.

The permanent record of the standard to the blockchain proves three critical things. First it guarantees that that the minting standard referenced on physical bitcoin wasn’t altered. Second, it ensures that anyone who holds that bitcoin in the future will be able to verify it for themselves. And lastly, since the verification process isn’t dependent on third party servers, it makes the in person physical ritual exchange uncensorable. Anyone can run the exact program in their own local environment or public notebook like Google Colab. Or they can use a public instance of the minting program through a user-friendly application like the one we have at thebitcoinmint.com.

Below is an example of bitcoin made physical with The Bitcoin Mint.

Natural Standard: View

Bitcoin Mint Address: 1BtcMintf7e255f562b2e91f155XXQuhUB

Minting Standard: Veiw

Minting App: Use

Simply copy and save the original Natural Standard that generated the address and upload it to the minting application. If it generates the same bitcoin address, then you know that the bitcoin accounted for at that address can only ever be seen as that physical object.

Physical bitcoin receipt

For this specific physical bitcoin, I attached an inscription (data file) to the minting transaction that acts like a physical bitcoin receipt. It is simply a message that lets anyone who looks up that address on a blockchain explorer know that the bitcoin was made physical. It includes a reference to the minting standard, natural standard image file, and a link to our public minting app. The QR code on the back of the physical bitcoin takes you to this receipt:

We plan to develop a new app that lets people scan the physical bitcoin in-hand to verify that it generates the same address instead of storing and sharing the original image to verify.

The Proof-of-Definition Ritual

This proof-of-definition process is ultimately an in-person exchange ritual. It demonstrates that the address can only ever be translated into that object and that the bitcoin located at the address will never leave.

In-fact all monetary systems follow some sort of ritual pattern. I recently spoke about this at the Anarchapulco Event on Practical wealth. You can see the full talk at their website. And if you want to read more about this, check out my article on Bitcoin’s Machine State Ritual.

Unlike the proof-of-work consensus mechanism, The Bitcoin Mint’s proof-of-definition ritual doesn’t depend on network adoption or even awareness. It is totally private and permissionless. You can mint your own real physical bitcoin without telling anyone. And you can freely exchange and verify bitcoin without a digital trace of your identity, behavior and associations. If you want to learn more about how Real Physical Bitcoin not only protects personal privacy, but protects the entire network from surveillance, read our Anarchist’s Guide to Cashing Out of The Matrix.

Redefining Money

From 2011-2013, Casascius Coins gave the bitcoin network an image and icon for the mysterious asset. For a short time, the public generally agreed on this form and function of bitcoin as money. But this consensus wasn’t grounded in the real world. It was loosely held together by the trust and reputation of a single individual.

The network lost this consensus once they saw how easy it was to break that trust. Bitcoin orbited this nebula’s space between being viewed as a currency, digital property, digital gold and a database. But amidst all of that debate, people rarely actually used bitcoin as money.

By reintroducing Bitcoin into physical space without central trust or regulatory exposure, The Bitcoin Mint protocol can not only restore bitcoin as money, it can reset the way we see and use money itself. Let me explain.

This proof of definition transforms bitcoin in the same way that planting a seed in the ground transforms it into a tree. It remains verifiably an expression of Bitcoin, but it changes how people perceive the asset both before and after it’s revealed. It demonstrates that any bitcoin in circulation has the potential to take material form. And the act of revealing that bitcoin then further transforms it by distinguishing it from all other bits of bitcoin.

While each expression can vary, their shared root identity as a bitcoin gives them a foundation of perceived value. For example, if one person mints real physical bitcoin with a poor design or cheap natural material, and then someone else mints a version with higher quality, people will most likely agree that the second option has more numismatic value than the initial one. But the perceived value of both will fluctuate with the price and demand for digital bitcoin.

This transformation protects the protocol from legal scrutiny because it democratizes the way that bitcoin is used and ultimately actualized. You can’t argue that it is a strict currency that competes with the US Dollar, because one person might use it to reveal it as art, and others might reveal it as historic collectibles. This dynamic nature of the protocol gives local communities and society as a whole the opportunity to collectively and organically rethink how we measure and exchange value with each other.

For example, communities can use it to create local mediums of exchange, like the popular private currency projects, Ithaca Hours and Tenino’s “wooden money.” Or they can use it to create an entirely new ritual of exchange. This type of actualization would not only facilitate mutual aid but it would preserve space for in-person exchange in an increasingly digital and cashless world.

In Our Cash Out of The Matrix series we at the Los Angeles Bitcoin Mint are hosting ongoing in-person conversation about these ideas and ways money should function in society. Subscribe to our Substack to learn where and how to join these conversations.

The Bitcoin Mint Press is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber.