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 0xfd69328230a5d7b1485361254a8b7761f7ce606dfaba87d3d99f0fb9fa1a4803. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12f2820d-89d6-4380-a08d-2f3aaf88969d.json and https://artists.proofprofile.net/proofs/artist/12f2820d-89d6-4380-a08d-2f3aaf88969d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pai Brothers (Original Motion Picture Soundtrack)
Junior Mandrake (Original Motion Picture Soundtrack)