John Evans may refer to: Academics John Evans (archaeologist) (1823–1908), English archaeologist and geologist John Evans (topographical writer) (1768–c. 1812), writer on Wales John Cayo Evans (1879–
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 0x4117642cae5bba22aa150bd8509b75a75fa6e7d8e5729767f804b3bde0724ff5. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d26b60a-8cbc-4252-b041-d79d0921f751.json and https://artists.proofprofile.net/proofs/artist/9d26b60a-8cbc-4252-b041-d79d0921f751.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).