Jeff James or Jeffrey James may refer to: Jeff James (baseball) (1941–2006), American baseball player Jeff James (musician) (born 1988), American singer and record producer Jeff James (public serv
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 0x15222b1bd29af3ad3199020e763690851ed904d92f93d6362bb06dc03a3b7d54. Chain 2 (Bitcoin): anchored in block 954002 (2026-06-16T20:47:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31f6195d-0897-447e-95f4-a056d5fbba93.json and https://artists.proofprofile.net/proofs/artist/31f6195d-0897-447e-95f4-a056d5fbba93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).