Quán is the Pinyin romanization of the Chinese family names / and , as well as a customary spelling of (pinyin: Guān). All written forms of the name are rare enough that they do not appear in the lis
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 0xe47c38e19fd6242dbd82bfb90826da0c6156911fd70ae69a016f9c14d573bc99. 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/d6876fde-8b06-4402-a0c9-4c5d3b23eb94.json and https://artists.proofprofile.net/proofs/artist/d6876fde-8b06-4402-a0c9-4c5d3b23eb94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).