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 0xfa705e128d46b3692bb2a93dee20b63a526aeecef40986ccfe7ac3b47b0218ca. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a49a4b1d-d8c3-49d4-bb06-5ffc3c38d0b4.json and https://artists.proofprofile.net/proofs/artist/a49a4b1d-d8c3-49d4-bb06-5ffc3c38d0b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).