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 0xe5bbd3d32c76ca0cd02c6573add88b31c597af0ccbf643ec2766548a06c77515. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1b251db-da26-481d-8e12-a7de51583d65.json and https://artists.proofprofile.net/proofs/artist/a1b251db-da26-481d-8e12-a7de51583d65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Franck Cavale ! Dans l'architecture de Manuelle Gautrand (Original Soundtrack)
Schott N.Y.C - Official Soundtrack (Spring/Summer 2022)
Schott N.Y.C - Official Soundtrack (Spring/Summer)