Claude Ndam (27 May 1955 – 12 June 2020) was a Cameroonian singer-songwriter. Biography Ndam was born in Foumban in the west of the country. He became famous in the 1980s for his discography. Claude
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 0xfc7fbeaa9ffb52271058f54912a3fe7d4218963451edbe09875e5dd7c9cff8b2. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2315389-f381-4322-8c0e-258cbf94daa7.json and https://artists.proofprofile.net/proofs/artist/a2315389-f381-4322-8c0e-258cbf94daa7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).