Yassin Mohamed Dris (born 4 April 1996) is a French professional footballer who plays as a left-back and centre-back for Tournai. Career Mohamed started his senior career with Lens. In 2013, he signe
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 0x6644288903a4ad60cb096536f6fa6bb03b0ffd12f4231b559f3360c2b0aba5d4. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49cb4a04-3feb-4faf-891d-9d501cced606.json and https://artists.proofprofile.net/proofs/artist/49cb4a04-3feb-4faf-891d-9d501cced606.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).