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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6be2a7c0112eb49db16c3e1f4ef13d62efe089a534ead3909e09abcd1fd3d63. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a5a99cf-9479-4959-b691-d450e95aa397.json and https://artists.proofprofile.net/proofs/artist/7a5a99cf-9479-4959-b691-d450e95aa397.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Capricho Espanhol / Opus 34 / Alvorada / Dango de Astúrias
The Music of Brazil: The Harmonica of Edu da Gaita - Recordings 1953 - 1957