Dr Christopher Harding (born July 1978) is a cultural historian of modern India and Japan, lecturer in Asian history at the University of Edinburgh, broadcaster and journalist. His series on culture a
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 0x0e576ce8b06ef762183327e09d715a6523feedeab58092106ad81afa62561292. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cae1042d-6e65-4b02-8a1b-161ec161ff71.json and https://artists.proofprofile.net/proofs/artist/cae1042d-6e65-4b02-8a1b-161ec161ff71.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).