Jack Lee may refer to: Sportspeople Jack Lee (cricketer) (1902–1944), English cricketer Jack Lee (footballer, born 1920) (1920–1995), English footballer and cricketer Jack Lee (footballer, born 1998)
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 0x44c9ecd0ceb34a2b243dde7dd0292abd2c81108585a9f91af58f6d08717b31fa. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea03e3bf-0c72-45c8-93b8-076abca4c06d.json and https://artists.proofprofile.net/proofs/artist/ea03e3bf-0c72-45c8-93b8-076abca4c06d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).