James Barlow may refer to: James Barlow (author) (1921–1973), British novelist James A. Barlow (1923–2015), American geologist and politician James E. Barlow (1881–1958), American civil engineer and
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ff4daa627b724fc8c4d46f347c7e73c87dac74d94f83f77b031daaf79b4f7. Chain 2 (Bitcoin): anchored in block 953911 (2026-06-16T08:03:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18f1f044-daee-4a8b-bedc-194116c53bab.json and https://artists.proofprofile.net/proofs/artist/18f1f044-daee-4a8b-bedc-194116c53bab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).