Perry Mason is a fictional American criminal defense lawyer that is the main character in detective fiction written by Erle Stanley Gardner. Perry Mason appears in 82 novels and four short stories, al
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 0x60c07cad79489ab74e28d1cab11f01d0c8b061858bccd0c43fb99d4e536516e4. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bf61d20-9375-4140-a576-d26a8cfdec17.json and https://artists.proofprofile.net/proofs/artist/6bf61d20-9375-4140-a576-d26a8cfdec17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).