250px|thumb Uriah Duffy (31 July 1975, Wakefield, Rhode Island, United States) is an American bassist. He is best known as the former bassist of Whitesnake. He is currently the bassist of the Californ
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 0x57248ee3b035689a84cdc9cd0d8cff462e3f3ed9e96aad520923fec3919e1b1f. 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/57f8ea6e-4efa-44c1-b464-0b934699ed11.json and https://artists.proofprofile.net/proofs/artist/57f8ea6e-4efa-44c1-b464-0b934699ed11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).