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 0x092d6cccbcc9339bee2fd976381bc033bb3826c10576588da7fc5dd9edd8c8e5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64e52e7a-bc1e-44f9-8afb-4f0351ee6989.json and https://artists.proofprofile.net/proofs/artist/64e52e7a-bc1e-44f9-8afb-4f0351ee6989.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reges Terrae (Music from the time of Charles V)
Reges Terrae - Music From the Time of Charles V
Vocal Music (Renaissance) - Victoria, T.L. De / Gesualdo, C. / White, R. / Palestrina, G.P. Da (Lamentations)