John or Johnny Jackson may refer to: Entertainment Art John Baptist Jackson (1701–1780), British artist John Jackson (painter) (1778–1831), British painter John Jackson (engraver) (1801–1848), Eng
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 0x7d3b90f96f403ea181a0345fb398925d79790da2ac0fdbb93dc428836d37008d. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ebdbc30-aa8f-4d6a-b005-d9f06f91b6fb.json and https://artists.proofprofile.net/proofs/artist/0ebdbc30-aa8f-4d6a-b005-d9f06f91b6fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).