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 0x138b2922215f41c64a868f50774db94c3ca0ca3bca569bf75ef6c084574a66f1. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b621347-4473-4f3f-984e-37480bdd1f8e.json and https://artists.proofprofile.net/proofs/artist/8b621347-4473-4f3f-984e-37480bdd1f8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le Nil - The Nile (Le chant des fleuves / The Song of the Rivers)
Can I Get A Witness? - 30 Years, 30 Artists, 30 Titles