Margery Louise Allingham (20 May 1904 – 30 June 1966) was an English novelist from the "Golden Age of Detective Fiction", and considered one of its four "Queens of Crime", alongside Agatha Christie, D
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 0x906c5776bd6a102ef054122bf3fe6021a5282475b9581b8081cb16dd480388a8. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1b726d9-3f22-41e0-9203-f8f854efe46c.json and https://artists.proofprofile.net/proofs/artist/c1b726d9-3f22-41e0-9203-f8f854efe46c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Safe as Houses. Albert Campion Mysteries
The Name On The Wrapper. Albert Campion Mysteries
A Matter of Form. Albert Campion Mysteries
The Meaning Of The Act. Albert Campion Mysteries
The Definite Article. Albert Campion Mysteries
The White Elephant. Albert Campion Mysteries
The Best Stories of Margery Allingham. Albert Campion Mysteries (Safe as Houses, The Meaning of the Act, The Definite Article, The Hat Trick and others)