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 0x9493d9cf8f86c28a8fb1c0713d6fa41fa1e07514107de9efa66d457cc8841262. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd07097d-a394-497b-a654-9b75edf49a14.json and https://artists.proofprofile.net/proofs/artist/bd07097d-a394-497b-a654-9b75edf49a14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Maurice Ohana: Complete Works for Solo Guitar
New Italian Music for 10-String Guitar: 4 Premières by Del Corno, Jappelli, Bombardelli, Susani