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 0x639bf672da5ff255954ef2dc1b2e516bbd704731f50746a6984a77f50ec87b45. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/feceb762-3d66-4c26-bf21-01e434f42a3c.json and https://artists.proofprofile.net/proofs/artist/feceb762-3d66-4c26-bf21-01e434f42a3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
100 Anos de Caymmi: Novos Artistas Interpretam Dorival Caymmi
Fábricas de Cultura e Tratore Apresentam: Atalhos Sonoros 2017