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 0x9a72947e4e8c05fae900cfa88cc4ad0fe7e0601c056d8748f0a720f0654cce02. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1ff5735-5c75-4cc1-9c08-84a62f518197.json and https://artists.proofprofile.net/proofs/artist/d1ff5735-5c75-4cc1-9c08-84a62f518197.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).