thumb|right|100px| Sir David Alexander Ogilvy Edward (born 14 November 1934) is a Scottish lawyer and academic, and former Judge of the Court of Justice of the European Communities. Sir David is an
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 0xc3ac3cff39eb3a74c48751736384f45be23b6c7b912dced214f9b121439a3885. Chain 2 (Bitcoin): anchored in block 953869 (2026-06-16T01:20:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06b3ccfb-f8eb-4115-8da7-d5e60a112322.json and https://artists.proofprofile.net/proofs/artist/06b3ccfb-f8eb-4115-8da7-d5e60a112322.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).