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zkVM prototype verifies early Bitcoin blocks in 27 milliseconds

Hazync says proving a full genesis-to-tip backfill could require about 17 GPU-years, while keeping up with new blocks would take capacity comparable to roughly six Nvidia L40S GPUs.

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CryptoSlate reports that Hazync’s developer demonstrated millisecond verification for an early segment of Bitcoin’s history, using a zero-knowledge virtual machine approach to generate compact receipts for block validation.

According to the disclosure, a 1.7 MB standalone verifier checked a 226,434-byte cryptographic receipt covering the first 1,789 blocks in 27 milliseconds, but the project stops short of a complete genesis-to-tip proof campaign.

The prototype is described as a research effort built on RISC Zero’s zkVM, where the zkVM executes Bitcoin validation rules and produces receipts that other users can check, with proof generation concentrated among provers and receipt verification distributed more broadly.

Hazync estimates roughly 17 GPU-years of compute for historical backfill, plus capacity equivalent to about six Nvidia L40S GPUs to keep pace with new blocks, and notes that benchmarks are representative rather than an audited measurement across all eras.

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