Peter Astbury Brunt FBA (23 June 19175 November 2005) was a British academic and ancient historian. He was Camden Professor of Ancient History at the University of Oxford from 1970 to 1982. During his
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b510a91ba4fd12e49c64ce60938123d841f5f1e8cc30e2dcbf33a8ab055b155. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0f8d046-3e1e-4934-9089-efd4521f786c.json and https://artists.proofprofile.net/proofs/artist/a0f8d046-3e1e-4934-9089-efd4521f786c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).