1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0xd4c75d53cba1d589636af4da9e181771e75fc25df6df8f9a2aabedbce1d8c282. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/046e1a81-de57-46a2-a5fb-63dccc9ef0f8.json and https://artists.proofprofile.net/proofs/artist/046e1a81-de57-46a2-a5fb-63dccc9ef0f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ensambe de Música Contemporánea del Damus
Concurso Nacional de Música de Cámara 2019: Premiados, Vol. 5