Pay a coin's hash.
Pick a coin and a Bitcoin block, then let your machine do real SHA-256 work until it finds a proof. Everything below runs in this tab. Nothing is sent anywhere, and the receipt at the end checks out against the same code the program uses.
Set up the proof
That isn't a Solana address. It should be 32 bytes of base58, usually 43 or 44 characters.
Bitcoin block to anchor to
Live anchors arrive when the relay launches. Until then, prove against the first blocks Bitcoin ever made.
Difficulty
The program enforces the block rule: a quarter of the block's zeros, at least 16. Higher settings are for bragging rights on your receipt.
Prover wallet
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Using a throwaway key made in this tab. Connect a wallet to bind the proof to your own address.
Live
Hashes0
Rate—
Best zeros0
Needed16
chance found by now0%
The receipt prints here when a proof is found. It shows the exact bytes that were hashed so anyone can check it.