John Luttrell may refer to: Sir John Luttrell (soldier) (c. 1518–1551), English soldier and courtier John Luttrell (painting), a 1550 painting by Hans Eworth John Luttrell (1566–1620), English law
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 0x17de4658b916134f14100647376628599057c0a1e125c902f6f595ca22861452. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0259aa4f-0ab7-4990-b243-74a5774c2daa.json and https://artists.proofprofile.net/proofs/artist/0259aa4f-0ab7-4990-b243-74a5774c2daa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).