Leeman may refer to: People Gary Leeman (born 1964), ice hockey player George Leeman (1809–1882), MP for York, England and chairman of the North Eastern Railway Kimberly Leemans, model Paul Leeman (b
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 0x43bfe2d1d93612639c64dfa6ca6532c588cb7f87e32369a69fbdcc5a191ba842. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/863c6c5f-3f16-41e3-86ac-12d21f4057de.json and https://artists.proofprofile.net/proofs/artist/863c6c5f-3f16-41e3-86ac-12d21f4057de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).