Hadrien is a French masculine given name. List of people with the name Hadrien Clouet (born 1991), French politician Hadrien David (born 2004), French racing driver Hadrien de Montferrand (born
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 0x9f0f51c519408f2c6efd8efe385605a5f23c8cb1e3a14163b8bfe0225e18f828. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b218733e-08bf-4766-a19c-3a4d14a0b912.json and https://artists.proofprofile.net/proofs/artist/b218733e-08bf-4766-a19c-3a4d14a0b912.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).