Khoa Quân
type: MusicGroup
genre: vinahouse
popularity: 5
followers: 24
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe510a6e2e69b33b58c10fca074bda920155cdf84fdd162338576ccd318dc507a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953907
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/16bb92ec-b651-4c3c-93bc-21e918b7be43.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/16bb92ec-b651-4c3c-93bc-21e918b7be43.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/16bb92ec-b651-4c3c-93bc-21e918b7be43
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe510a6e2e69b33b58c10fca074bda920155cdf84fdd162338576ccd318dc507a","name":"Khoa Quân","registered_at":"2026-06-15T21:42:58Z","symbol":"NIM0840669","token_address":"0x6d0c724d3c28163534bbd22fc5d95b744a153c9d","type":"artist","uuid":"16bb92ec-b651-4c3c-93bc-21e918b7be43"}
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 0xe510a6e2e69b33b58c10fca074bda920155cdf84fdd162338576ccd318dc507a. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16bb92ec-b651-4c3c-93bc-21e918b7be43.json and https://artists.proofprofile.net/proofs/artist/16bb92ec-b651-4c3c-93bc-21e918b7be43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:39:24Z
  text: {"copyright_id":"0xe510a6e2e69b33b58c10fca074bda920155cdf84fdd162338576ccd318dc507a","name":"Khoa Quân","registered_at":"2026-06-15T21:42:58Z","symbol":"NIM0840669","token_address":"0x6d0c724d3c28163534bbd22fc5d95b744a153c9d","type":"artist","uuid":"16bb92ec-b651-4c3c-93bc-21e918b7be43"}
album: Làm Dâu Má Anh
  type: MusicAlbum
  date published: 2022-09-14
album: Cần Bao Lâu
  type: MusicAlbum
  date published: 2023-03-05
album: Cần Bao Lâu (Lofi Version)
  type: MusicAlbum
  date published: 2023-03-15
album: Cần Bao Lâu (Remix Version)
  type: MusicAlbum
  date published: 2023-03-15
  track: Cần Bao Lâu - Remix Version
    type: MusicRecording
    duration: PT3M17S
    duration ms: 197326
    explicit: false
    by artist: Khoa Quân
    in album: Cần Bao Lâu (Remix Version)
      type: MusicAlbum
      date published: 2023-03-15
    genre: vinahouse
    isrc code: QM4TX2361927
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T20:23:09+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x4e2d7c05cfec884a2f0ba498290fb90414d6056db66492d2430371dac01c60dd
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958324
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958324
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2361927
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T23:25:39Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2d7c05cfec884a2f0ba498290fb90414d6056db66492d2430371dac01c60dd. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:25:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2361927.
      date published: 2026-07-16T23:25:39Z
    audio: Cần Bao Lâu - Remix Version
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 125.97
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.799
      additional property: Energy
        type: PropertyValue
        value: 0.912
      additional property: Speechiness
        type: PropertyValue
        value: 0.038
      additional property: Acousticness
        type: PropertyValue
        value: 0.105
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.374
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.391
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.72
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Cần Bao Lâu (DPhong Lofi)
  type: MusicAlbum
  date published: 2023-03-15