Black Notice is a crime novel by American writer Patricia Cornwell. It is the tenth book of the Dr. Kay Scarpetta series. Plot summary Dr. Kay Scarpetta is still shocked by the tragic loss of Benton
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce2b481ae060b416eebca7e3d0886a00cc7f15593c450d393046a9b5fba6244. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08590920-f5b9-4ad4-9a51-87529d65410f.json and https://artists.proofprofile.net/proofs/artist/08590920-f5b9-4ad4-9a51-87529d65410f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.