Cold Fairyland () is a Chinese rock music group based in Shanghai. Their style combines Eastern melodies and rhythms with Western symphonic rock and classical music. The band has two sides; classical
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 0xfab6771ef881b29be3fb887981f513a4a1eafd32cc5db5ecd49282bd49c1cde2. 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/b3f40fd1-71b7-473b-9a84-ae97b971822a.json and https://artists.proofprofile.net/proofs/artist/b3f40fd1-71b7-473b-9a84-ae97b971822a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
B Side of the Best of Cold Fairyland 2001​-​2015 (Live)