John Brownlow may refer to: Sir John Brownlow, 1st Baronet (c. 1595–1678) of the Brownlow baronets Sir John Brownlow, 3rd Baronet (1659–1697) John Brownlow, 1st Viscount Tyrconnel (1690–1754) John Br
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 0x1fe4f3d6961edf881be0946a0ea9448b25826b0e038e12fee79bacfc4d231b9f. Chain 2 (Bitcoin): anchored in block 953843 (2026-06-15T22:27:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0082c64c-dc14-4bfa-aea3-8bc70df0c56a.json and https://artists.proofprofile.net/proofs/artist/0082c64c-dc14-4bfa-aea3-8bc70df0c56a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).