Chris Chapman may refer to: Chris Chapman (rugby league, born 1966), former rugby league footballer Chris Chapman (seismologist) (born 1945), British seismologist Chris Chapman (producer) (born 198
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 0x330ef16c2335aa58fa73e187e6b73c80e9b0651db058cefd9ff2b83db9ade7ac. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a8fb777-4a84-4e69-a4fa-abf0fc5e0466.json and https://artists.proofprofile.net/proofs/artist/2a8fb777-4a84-4e69-a4fa-abf0fc5e0466.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).