David E. Cox (February 20, 1938 – July 13, 2010) was an American politician from Holdenville, Oklahoma. A Republican, he served as a California State Senator, representing the 1st district from Decemb
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 0x467735d033d1489ac67103c2af547ea5172f4a193cd84d8ca668a33b209e0f3e. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af144b28-dbba-477a-a680-8e688406004b.json and https://artists.proofprofile.net/proofs/artist/af144b28-dbba-477a-a680-8e688406004b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).