Brian Horace Clemens (30 July 1931 – 10 January 2015) was an English screenwriter and television producer. He worked on the British TV series The Avengers and created The New Avengers and The Profess
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 0x23537823bffba2e2b4e962b9e87e46107110f16440b503f2ad9987e103d110ce. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa7a920c-9ce5-432e-b02e-3a78ca7fee8a.json and https://artists.proofprofile.net/proofs/artist/fa7a920c-9ce5-432e-b02e-3a78ca7fee8a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.