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 0x67478b17898253d4197510282d3c261a759b3173bc260033562b61ba1cf3d51d. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03eb001c-db49-4ddd-a8be-bbd5285d7c48.json and https://artists.proofprofile.net/proofs/artist/03eb001c-db49-4ddd-a8be-bbd5285d7c48.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
17 Se 18 Ke Age Ohi Se (From "Lallu Ki Laila")
Hamra Chand Ke Dekhe Khatir (From "Hira Babu M.B.B.S.")