Joseph Koo Kar-Fai (; 25 February 1931 – 3 January 2023) was a Hong Kong composer. He used the pen name Moran (莫然) for Mandarin songs early in his career. According to the Hong Kong Academy for Perfo
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 0x4d13c0f6ab39f2710918d8d4ae6c84559c9da765d3a85e8f80b9ffc9faafcc5e. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dab2d7f7-80c4-4f68-a670-9c6d0858f476.json and https://artists.proofprofile.net/proofs/artist/dab2d7f7-80c4-4f68-a670-9c6d0858f476.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).