Eric Kupper is an American keyboardist, arranger, songwriter, remix artist, DJ, and record producer of French descent. Biography Eric Kupper began playing in bands in his formative years, and got his
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 0x57fe582b7d0ff445fb792dd9fdc361d20169cd338205f9b37230cb26d9d999a4. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a2085d1-0657-483d-9549-44bc18d5c718.json and https://artists.proofprofile.net/proofs/artist/3a2085d1-0657-483d-9549-44bc18d5c718.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).