Guillaume Leclerc (born 20 February 1996) is a French professional ice hockey player for Brûleurs de Loups of the Ligue Magnus. He represented France at the 2019 IIHF World Championship. References
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 0x10c61ce6ceae3ea6a34aea13b1b74d35d529f8b103c546a8b3648cf8b09e66c8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5384eddb-79bc-46a7-85a0-c3ce66320c92.json and https://artists.proofprofile.net/proofs/artist/5384eddb-79bc-46a7-85a0-c3ce66320c92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).