Jack Evans may refer to: Sports Association football Jack Evans (footballer, born 1889) (1889–1971), Welsh international footballer Jack Evans (footballer, born 1891) (1891–1966), Australian rules
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 0x86b40f930eecf3eeae4b4a7fe327037abea01d603d6377d265e92f1fda94cd77. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d848525e-1c08-4122-a3cc-0fbb7a6a515e.json and https://artists.proofprofile.net/proofs/artist/d848525e-1c08-4122-a3cc-0fbb7a6a515e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).