Chiu is a romanization of various Chinese surnames, based on different varieties of Chinese. It may correspond to the surnames spelled in the following ways in Mandarin pinyin: Zhào () or Zhāo (), fr
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 0x0abd04c4fc44a2f5c5e638b2b8596dafb101ff62bbb63708dc2728caad844b27. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcb69eea-c877-4cfb-9cbe-61c1acf0203c.json and https://artists.proofprofile.net/proofs/artist/dcb69eea-c877-4cfb-9cbe-61c1acf0203c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).