Paul Marchard (April 17, 1937 – July 24, 2011) was the Roman Catholic bishop of the Roman Catholic Diocese of Timmins, Canada. Marchand was born in Lafontaine, Ontario and grew up in the area near Ge
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 0x987e068f976a30f7a25bfcd81775108635afec9c8e5cbc0bbe82a4080e7253bc. Chain 2 (Bitcoin): anchored in block 953889 (2026-06-16T04:57:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d7857d7-2d79-4964-8eb9-6a0d2e326303.json and https://artists.proofprofile.net/proofs/artist/0d7857d7-2d79-4964-8eb9-6a0d2e326303.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).