Lema may refer to: Places Benin Lèma, Dassa-Zoumè Lèma, Savalou United States Lema, California, former Pomo settlement in Mendocino County Lake Eustis Museum of Art (LEMA), Florida Elsewhere Lema,
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 0xee5a72c25f5774ca5df80683fcf6de5bf172e76f0b9c5c01b41441cc6f56d878. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fa69319-6edf-4391-8295-7f707c9ac2ea.json and https://artists.proofprofile.net/proofs/artist/0fa69319-6edf-4391-8295-7f707c9ac2ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).