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 0x93e66abf7db32fe8f2dbbab9d691a7e2f9ad7e808801d9e36a52c760cd13d47a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6e71b80-20b8-4e7a-8e8b-2b7c1b625024.json and https://artists.proofprofile.net/proofs/artist/c6e71b80-20b8-4e7a-8e8b-2b7c1b625024.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Doble Tono 2 (Musicologos Musica de Chipeo)