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 0x0ac1a148a9f5ed09442d33a1c87637f8124bb98acbc489c7a4ad8c0c6ae347c2. 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/3d04318d-3057-426d-8031-df0df5116a20.json and https://artists.proofprofile.net/proofs/artist/3d04318d-3057-426d-8031-df0df5116a20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mehteran, Vol. 4 (Live Concert of the Mehteran Band)
Mehteran, Vol. 2 (Live Concert of the Mehteran Band)
Mehteran, Vol. 3 (Live Concert of the Mehteran Band / Ottoman Military Music)