Andrew Barlow or Andy Barlow may refer to: Andrew Barlow (1899–1961), Australian cricket umpire Andrew Henry Barlow (1837–1915), politician in Queensland, Australia Andy Barlow (footballer) (born
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 0xa5432fcd2df4be1faef2ca374f3583b0542b1276756f71c5d3072ecf801d488c. 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/0bdb5f4f-8c51-436f-8d91-351e6988ebb1.json and https://artists.proofprofile.net/proofs/artist/0bdb5f4f-8c51-436f-8d91-351e6988ebb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).