Hervé Le Tellier (; born 21 April 1957) is a French writer and linguist, and a member of the international literary group Oulipo (Ouvroir de Littérature Potentielle, which translates roughly as "work
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6488e5700cee1d69881eee2814e02415da872cfcad36fe9e9a38fef5a4f6e9ae. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fb73952-968d-46f2-afe8-c257ecee2b84.json and https://artists.proofprofile.net/proofs/artist/0fb73952-968d-46f2-afe8-c257ecee2b84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).