1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3332282a04543cbdf5c38095ac0f09827e4b4e517e7f85e886e5e3e59f23eb4f. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/322cdbeb-5bb6-4104-b220-d5beaa9ba755.json and https://artists.proofprofile.net/proofs/artist/322cdbeb-5bb6-4104-b220-d5beaa9ba755.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Naughty Marietta: "Ah! Sweet Mystery of Life"
Il Barbiere di Siviglia, Act I: "Una voce poco fa"
Dinorah: "Recitative and Canzonetta of the Goatherd"
Enrico Caruso, Vol. 3 (Recordings 1911-1913)