Xuân Qua
type: MusicGroup
genre: v-pop
popularity: 4
followers: 13
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0f0f2f631d6bbb95bf5dadc2d9789ed3c36a4c51531eb8b0ed6e51225c59eca4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954603
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954603
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bfba55fb-fa2d-47e3-8968-7a5af674929d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bfba55fb-fa2d-47e3-8968-7a5af674929d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bfba55fb-fa2d-47e3-8968-7a5af674929d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0f0f2f631d6bbb95bf5dadc2d9789ed3c36a4c51531eb8b0ed6e51225c59eca4","name":"Xuân Qua","registered_at":"2026-06-20T18:35:48Z","symbol":"NIM1682787","token_address":"0x2c3d74e74370a5eb55d8c6cb1bfa37ea5e009830","type":"artist","uuid":"bfba55fb-fa2d-47e3-8968-7a5af674929d"}
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 0x0f0f2f631d6bbb95bf5dadc2d9789ed3c36a4c51531eb8b0ed6e51225c59eca4. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfba55fb-fa2d-47e3-8968-7a5af674929d.json and https://artists.proofprofile.net/proofs/artist/bfba55fb-fa2d-47e3-8968-7a5af674929d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
  text: {"copyright_id":"0x0f0f2f631d6bbb95bf5dadc2d9789ed3c36a4c51531eb8b0ed6e51225c59eca4","name":"Xuân Qua","registered_at":"2026-06-20T18:35:48Z","symbol":"NIM1682787","token_address":"0x2c3d74e74370a5eb55d8c6cb1bfa37ea5e009830","type":"artist","uuid":"bfba55fb-fa2d-47e3-8968-7a5af674929d"}
album: Thương Em Đến Già
  type: MusicAlbum
  date published: 2022-04-02
  track: Thương Em Đến Già
    type: MusicRecording
    duration: PT4M4S
    duration ms: 244668
    explicit: false
    by artist: Xuân Qua
    in album: Thương Em Đến Già
      type: MusicAlbum
      date published: 2022-04-02
    genre: v-pop
    isrc code: GX4R52215253
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T06:45:22+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x21d8537ead8af06983eaad88c7f5a0a313d28ba22930e2de1cc9e5851c75a5ae
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958256
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958256
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX4R52215253
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T07:22:18Z
    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 0x21d8537ead8af06983eaad88c7f5a0a313d28ba22930e2de1cc9e5851c75a5ae. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GX4R52215253.
      date published: 2026-07-16T07:22:18Z
    audio: Thương Em Đến Già
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 109.992
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.7
      additional property: Energy
        type: PropertyValue
        value: 0.201
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.827
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.875
      additional property: Liveness
        type: PropertyValue
        value: 0.196
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.359
      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.092
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Yến Vô Hiết
  type: MusicAlbum
  date published: 2022-04-02