bạn khoa
type: MusicGroup
genre: vietnamese hip hop
genre: vietnam indie
genre: v-pop
popularity: 5
followers: 389
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfa2b420d4d5dcf954d64bcf4d8603db52b98cf0ecdeb7ca6174572f51a81144c
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/d9c43110-acc3-47fd-ab4e-1fd59f404dd1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d9c43110-acc3-47fd-ab4e-1fd59f404dd1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d9c43110-acc3-47fd-ab4e-1fd59f404dd1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:51:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfa2b420d4d5dcf954d64bcf4d8603db52b98cf0ecdeb7ca6174572f51a81144c","name":"bạn khoa","registered_at":"2026-06-21T04:22:53Z","symbol":"NIM1814783","token_address":"0x4f9ae88e3d027d292fe45aaf9e409e48f2480a9a","type":"artist","uuid":"d9c43110-acc3-47fd-ab4e-1fd59f404dd1"}
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 0xfa2b420d4d5dcf954d64bcf4d8603db52b98cf0ecdeb7ca6174572f51a81144c. 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/d9c43110-acc3-47fd-ab4e-1fd59f404dd1.json and https://artists.proofprofile.net/proofs/artist/d9c43110-acc3-47fd-ab4e-1fd59f404dd1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:51:12Z
  text: {"copyright_id":"0xfa2b420d4d5dcf954d64bcf4d8603db52b98cf0ecdeb7ca6174572f51a81144c","name":"bạn khoa","registered_at":"2026-06-21T04:22:53Z","symbol":"NIM1814783","token_address":"0x4f9ae88e3d027d292fe45aaf9e409e48f2480a9a","type":"artist","uuid":"d9c43110-acc3-47fd-ab4e-1fd59f404dd1"}
album: Noname1
  type: MusicAlbum
  date published: 2019-09-12
album: Mình Yêu Mất Rồi
  type: MusicAlbum
  date published: 2019-09-12
album: Thật Là Khó
  type: MusicAlbum
  date published: 2019-12-08
  track: Thật Là Khó
    type: MusicRecording
    duration: PT5M4S
    duration ms: 304855
    explicit: false
    by artist: bạn khoa
    in album: Thật Là Khó
      type: MusicAlbum
      date published: 2019-12-08
    genre: vietnamese hip hop
    genre: vietnam indie
    genre: v-pop
    isrc code: FRX201963700
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T04:18:14+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0bc0450e044a366ba177e3401b7b65b88784307f58e81a80c9e79ff61c1e601e
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958245
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958245
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201963700
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T07:20:32Z
    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 0x0bc0450e044a366ba177e3401b7b65b88784307f58e81a80c9e79ff61c1e601e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:32Z), 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/FRX201963700.
      date published: 2026-07-16T07:20:32Z
    audio: Thật Là Khó
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 99.97
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.811
      additional property: Energy
        type: PropertyValue
        value: 0.316
      additional property: Speechiness
        type: PropertyValue
        value: 0.214
      additional property: Acousticness
        type: PropertyValue
        value: 0.774
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.231
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.398
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.355
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Habromania
  type: MusicAlbum
  date published: 2023-09-10