Wu Qing-feng (; born 1982), also known as Wu Tsing-fong or Greeny Wu, is a Taiwanese singer-songwriter and the lead vocalist of Sodagreen. In addition to being the principal creative force for his own
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 0xa0406756b616c6419a07341a2419458c702434eb7a9d4e2651c7295d86e461e1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61fb7bf5-248b-41e2-8bb8-2143c526bac7.json and https://artists.proofprofile.net/proofs/artist/61fb7bf5-248b-41e2-8bb8-2143c526bac7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).