The Dice Man is a 1971 novel by American novelist Luke Rhinehart a pen name for George Cockcroft. Synopsis The book tells the story of a psychiatrist who makes daily decisions based on the casting of
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 0xf01fc547aaf128d7422a7366a1d99bf622ca3e632a1695b2bca3be1e79faa6f0. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07bd9b61-9db5-45e6-b9aa-59386446ae3e.json and https://artists.proofprofile.net/proofs/artist/07bd9b61-9db5-45e6-b9aa-59386446ae3e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).