Dame Hilary Mary Mantel ( ; born Thompson; 6 July 1952 – 22 September 2022) was a British writer whose work includes historical fiction, personal memoirs and short stories. Her first published novel,
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 0x88061da99efe08f6b5714e9206507e85b6aba5063f63635b516eedead1280c35. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7db06cf7-72e0-455a-af7c-0f48acac3bbb.json and https://artists.proofprofile.net/proofs/artist/7db06cf7-72e0-455a-af7c-0f48acac3bbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).