Eric P. Liu (; born 1968) is an American lawyer and CEO and co-founder of Citizen University, a non-profit organization promoting civic empowerment.Citizen University Liu served as Deputy Assistant to
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 0x1391c79bbc9a19e636da23d05bc3451858b03e12998b3a44596ff7d787b6a952. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ba83687-527e-4b81-8a5e-e7d478b75beb.json and https://artists.proofprofile.net/proofs/artist/9ba83687-527e-4b81-8a5e-e7d478b75beb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).