Pierre-Mathieu Vilmet (; born September 7, 1964), professionally known as Pierpoljak (), is a French reggae and pop singer. Biography Pierre Vilmet was born in Paris and grew up in the Parisian subur
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 0xf895312100855021b7c55722a670d4b27bbad81c4f98846a882986fa3052ba6c. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f919e4fd-48b8-45a1-9c9d-ddd3b8973a5b.json and https://artists.proofprofile.net/proofs/artist/f919e4fd-48b8-45a1-9c9d-ddd3b8973a5b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).