John Griffin may refer to: Lawyers John Griffin (judge) (1774/1779 – after 1823), American jurist and member of the Michigan Territorial Supreme Court, 1806–1823 John Bowes Griffin (1903–1992), Briti
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 0x07f7bd01e2fd1861c4ab641a565a70031bb6f020a9f0e1c48ebe3bbbfa4c7f3d. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/350e78ff-c9fb-4c5e-b763-d0d28e9eab46.json and https://artists.proofprofile.net/proofs/artist/350e78ff-c9fb-4c5e-b763-d0d28e9eab46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).