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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9427c175a011c93eff99d93e55b72d18905be3ba3df9ddadea0b90593b4fa016. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/574b9d3b-8519-4287-b61a-55e8dcc6a8b0.json and https://artists.proofprofile.net/proofs/artist/574b9d3b-8519-4287-b61a-55e8dcc6a8b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestral Music (French) - Mehul, E.-N. / Berlioz, H. / Lalo, E. / Saint-Saens, C. / Charpentier, G. / Roussel, A. / Dupont, G.E.X.