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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd211a77f004fbc0534495f4b0115163cb91fa9b2f81571d21a947c87388390c5. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7ba3766-a984-4aa0-9a0f-58947b18defc.json and https://artists.proofprofile.net/proofs/artist/d7ba3766-a984-4aa0-9a0f-58947b18defc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Asmar ya Helo, Bassak Teji Haretna, Mayel ya Ghzayel
Arabic Medley 2 (Sabry Aalil, Ben el Aser wel Maghreb, Galbi, Ah ya Leil)
Ete Du Ayn Heqiatnes, An Eisai Ena Asteri