David Nicholas, (born 1 December 1991) is an Australian cyclist. He won silver and gold medals at the 2012 London Paralympics and a gold medal at the 2016 Rio Paralympics and a bronze medal at the 2
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 0x9298c5935cc2753d6e803ff9f43e962396d74c5b41a5193e2976bc412cb15898. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45731a31-5ad8-49b4-8d7d-0559a0184219.json and https://artists.proofprofile.net/proofs/artist/45731a31-5ad8-49b4-8d7d-0559a0184219.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).