Xiu () is a Chinese language on-line shopping vertical, e-commerce company that operates in the People's Republic of China. Xiu was founded by Ji Wenhong (George Ji) and Jin Huang in March 2008. Xiu.
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 0xf4e3d9ab19232bd128599963aff83397b5dd5b9cdb75f70782c45bee9655eb5a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0513e3d3-b3c6-4986-a1b0-98fa10aad508.json and https://artists.proofprofile.net/proofs/artist/0513e3d3-b3c6-4986-a1b0-98fa10aad508.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).