Gregory Brown may refer to: Art Greg Brown (painter) (1951–2014), American painter from Palo Alto, California F Gregory Brown (1887–1941), British artist Music Greg Brown (folk musician) (born 19
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 0x2bafce62f347881f27ea4dc970f53e978a8802071189c7c6b2ea53bc6c2a603e. Chain 2 (Bitcoin): anchored in block 953886 (2026-06-16T04:37:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cb40134-31b0-4ba8-bc3d-900269ef0161.json and https://artists.proofprofile.net/proofs/artist/0cb40134-31b0-4ba8-bc3d-900269ef0161.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).