Joseph Koo
type: MusicGroup
description: 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
popularity: 4
followers: 636
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4d13c0f6ab39f2710918d8d4ae6c84559c9da765d3a85e8f80b9ffc9faafcc5e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954650
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954650
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dab2d7f7-80c4-4f68-a670-9c6d0858f476.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dab2d7f7-80c4-4f68-a670-9c6d0858f476.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/dab2d7f7-80c4-4f68-a670-9c6d0858f476
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:51:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4d13c0f6ab39f2710918d8d4ae6c84559c9da765d3a85e8f80b9ffc9faafcc5e","name":"Joseph Koo","registered_at":"2026-06-21T04:23:31Z","symbol":"NIM1818563","token_address":"0xf3a16e5401b18b6a940c0d9dbe66add12b06e3a6","type":"artist","uuid":"dab2d7f7-80c4-4f68-a670-9c6d0858f476"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: 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).
  date published: 2026-06-21T04:51:12Z
  text: {"copyright_id":"0x4d13c0f6ab39f2710918d8d4ae6c84559c9da765d3a85e8f80b9ffc9faafcc5e","name":"Joseph Koo","registered_at":"2026-06-21T04:23:31Z","symbol":"NIM1818563","token_address":"0xf3a16e5401b18b6a940c0d9dbe66add12b06e3a6","type":"artist","uuid":"dab2d7f7-80c4-4f68-a670-9c6d0858f476"}
album: New Hope for New World
  type: MusicAlbum
  date published: 2017
album: Beauty Sunshine
  type: MusicAlbum
  date published: 2017
album: Dark Eyes Music
  type: MusicAlbum
  date published: 2019-08-02
album: Hand of Death
  type: MusicAlbum
  date published: 2022