Richard Cook or Cooke may refer to: Artists Richard Cook (artist 1784–1857), English artist Richard Cook (journalist) (1957–2007), British jazz writer, magazine editor and former record company exe
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9217664c176cf907e804e4b103bb610caeea1ebede8b7613e0cc784fe6d69e1f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a7c1330-4064-409f-9836-928d48ca6c4e.json and https://artists.proofprofile.net/proofs/artist/4a7c1330-4064-409f-9836-928d48ca6c4e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).