Hua or HUA may refer to: China Hua, as in Huaxia and Zhonghua, a name of China Hoa people, Chinese people in Vietnam Hua (state), a state in ancient China, destroyed by Qin Hua (surname), a Chi
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 0x6883c461a36f933ffe29a9e1183f5f0d153479f6b70246e1afb455b8b90cee08. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83c199d7-4954-48b5-a00e-790cd5001703.json and https://artists.proofprofile.net/proofs/artist/83c199d7-4954-48b5-a00e-790cd5001703.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).