Peter Chapman may refer to: Peter Chapman (politician) (born 1950), Scottish Conservative politician Peter Chapman (murderer) (born 1977), English convicted murderer Peter Chapman (cartoonist) (19
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 0xe3401890a61a488bab42ade2f67b847f5a72fe23af17e0a11369d5b5ea472a2c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfa9cc84-a838-434e-a20e-21f584d6ee95.json and https://artists.proofprofile.net/proofs/artist/cfa9cc84-a838-434e-a20e-21f584d6ee95.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).