thumb|Portrait of Andrea Jones by Jonathan Buckley - © Jonathan Buckley 2025, All Rights Reserved. Andrea Jones is one of the worlds's foremost garden, plant and landscape photographers who photograp
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 0xbb000e2d209e3d2080e09c9f9fea1e0f1fe45a920527a4479c2b5742663deac3. Chain 2 (Bitcoin): anchored in block 953892 (2026-06-16T05:01:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ec2d185-0646-417a-964e-3172a79243fe.json and https://artists.proofprofile.net/proofs/artist/0ec2d185-0646-417a-964e-3172a79243fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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