Someone buried a puzzle inside Bitcoin's oldest block — and we're not entirely sure whether it's genius, performance art, or a wind-up.
On 22 August, an unidentified person embedded a 255-byte human-readable message into block 963,629, announcing a Bitcoin wallet puzzle they claim to have built using data from Satoshi Nakamoto's Genesis Block. Galaxy Research spotted it the following day. The block was mined by Foundry USA at around 19:45 UTC, and it's now a confirmed, permanent part of Bitcoin's transaction history. Whatever this is, it's not going anywhere.
What the message actually says
The creator used an OP_RETURN output — a method that lets you attach arbitrary data to a transaction in a provably unspendable form — to publish their announcement. The full payload came in at 255 bytes, which was more than half the transaction's total 500-byte size. Galaxy Research called it an "oversized OP_RETURN," not because it breaks any of Bitcoin's rules, but because it's substantially larger than what you'd typically see in a data output.
The message itself is blunt: the wallet was generated using information from the Genesis Block, the entropy is "extremely low," and the creator claims no private backup was needed because "everything I needed was already in the Genesis Block." Satoshi mined block zero on 3 January 2009. Its publicly available data includes a timestamp (1231006505), a nonce (2083236893), a Merkle root, a public key, and the famous embedded newspaper headline — "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks."
Any of those values, alone or combined, could form part of however this key was generated. That's the puzzle. The creator didn't reveal the derivation formula, and the message doesn't tell you which data was used, in what order, or what transformation was applied.
Low entropy is worth taking seriously here. When a private key is generated from well-known public data rather than genuine randomness, it becomes theoretically reproducible. [As we've seen with the Coldcard key flaw that drained $38M](/getohedz/crypto/38m-in-bitcoin-drained-by-coldcard-key-flaw-its-maker), the gap between "theoretically secure" and "actually secure" can be brutal. The whole point of this puzzle is that the seed is already out in the open — solvers just need to figure out exactly how the creator processed it.
What we don't know (which is most of it)
The creator's identity is unknown. The reward amount hasn't been independently verified. As of Galaxy Research's disclosure, nobody had moved any funds from the wallet — which means either nobody's cracked it yet, or the creator is sitting on the solution themselves.
It's also worth being clear about what on-chain embedding actually proves: it confirms the message existed by 22 August 2026. It does not confirm that every claim inside it is true. The creator could be anyone, and the wallet could hold anything from a meaningful sum to absolutely nothing.
The only event that would change this story meaningfully is an outgoing transaction from the puzzle wallet — a spend signed by the correct private key. That would confirm someone derived the solution. Even then, it could be the creator themselves claiming their own puzzle back.
Until that happens, this sits in a strange middle ground: a confirmed on-chain curiosity built around the most mythologised block in crypto history, authored by someone who clearly knows enough to do it but hasn't given us enough to follow. Could be brilliant. Could be nothing. Bitcoin's genesis has attracted stranger things.