Bradley J. Cook (born October 19, 1964) is an American historian and academic administrator serving as president of the American University of Bahrain. He previously served as the 17th president of S
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 0xa1c64343b94cb804682db697b3c5155e292854485a2e8154dd48cdc14117d147. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfe3ba67-b5cc-4ca9-8c22-ed1177c1cbc4.json and https://artists.proofprofile.net/proofs/artist/dfe3ba67-b5cc-4ca9-8c22-ed1177c1cbc4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).