David Mullin is British archaeologist specialising in the study of prehistory. He has worked at the University of Worcester, Oxford Archaeology, and the University of Oxford. Education Mullin studi
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 0x2871d2a8a919b5bab3f35d33913c0df8f65bf6e3d468349dc22ffa75e0d9ef0a. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1047f7ce-418a-4280-be62-c0bd915edccc.json and https://artists.proofprofile.net/proofs/artist/1047f7ce-418a-4280-be62-c0bd915edccc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).