Pierre de la Rue (20 November 1518) was a Franco-Flemish composer and singer of the Renaissance. His name also appears as Piersson or variants of Pierchon and his toponymic, when present, as various f
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 0xdc3ce2e1e43819eae47a7f0bd2fbb6ae2366e5bf15a5b11453dd41faddb45f3d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/934152e2-df06-4a19-98ec-d6eb54fab7e0.json and https://artists.proofprofile.net/proofs/artist/934152e2-df06-4a19-98ec-d6eb54fab7e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).