__NOTOC__ George Duffield MBE (born 30 November 1946) is an English retired flat racing jockey. He served a seven-year apprenticeship with Jack Waugh, and rode his first winner on 15 June 1967 at Gr
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 0x3e8748c4f2602e3f25db89abc3252718b6597cb71ab13ee5085a58ae1d7676b0. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c39e9dac-f978-490f-8963-506f746821b8.json and https://artists.proofprofile.net/proofs/artist/c39e9dac-f978-490f-8963-506f746821b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).