John Stone may refer to: Politicians John Stone (Parliamentarian) (before 1632 – after 1659), English politician John Stone (MP for Wallingford) (before 1679 – after 1685), English politician John G
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 0xa4b50d37c94277992b6b0c4a49592a3def94f994f8f305125505c008ac05f2c3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74b6bf32-18a5-401f-9b49-3355783f1c63.json and https://artists.proofprofile.net/proofs/artist/74b6bf32-18a5-401f-9b49-3355783f1c63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).