thumb|upright=1.3|A 17th century painting depicting the Denial of Peter, found in the four Gospels in the New Testament. In it, Peter denies having associated with Jesus, who is being sought by author
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 0x7de1c0c92b165d29d4d239ca38225b976ca6b8f756577022facf264d93b638d4. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f5224ca-1a62-4efb-b44e-a6697aa35e40.json and https://artists.proofprofile.net/proofs/artist/8f5224ca-1a62-4efb-b44e-a6697aa35e40.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).