Hazync verified the first 1,789 Bitcoin blocks in 27 milliseconds with a 226,434-byte receipt. The developer estimates roughly 17 GPU-years for a complete genesis-to-tip backfill, followed by capacity equivalent to about six Nvidia L40S GPUs to keep pace with new blocks. The prototype uses RISC Zero’s zero-knowledge virtual machine and reuses substantial parts of Bitcoin Core v28’s consensus code and libsecp256k1. The full-chain proof remains unfinished, with open risks including code resets, archive data requirements and a pending professional audit.
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