Hằng Cat
type: MusicGroup
genre: v-pop
popularity: 2
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6954fec57b91ca3a2ba6fc0931a322f39dc0ad7bf6434df8edbb9e464fa0fffb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b3000033-61c4-4e18-96f0-a23795aac963.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b3000033-61c4-4e18-96f0-a23795aac963.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b3000033-61c4-4e18-96f0-a23795aac963
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6954fec57b91ca3a2ba6fc0931a322f39dc0ad7bf6434df8edbb9e464fa0fffb","name":"Hằng Cat","registered_at":"2026-06-20T13:35:37Z","symbol":"NIM1621634","token_address":"0xadf5b10cf29a5f8a9b12d52edd997985841d280c","type":"artist","uuid":"b3000033-61c4-4e18-96f0-a23795aac963"}
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 0x6954fec57b91ca3a2ba6fc0931a322f39dc0ad7bf6434df8edbb9e464fa0fffb. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3000033-61c4-4e18-96f0-a23795aac963.json and https://artists.proofprofile.net/proofs/artist/b3000033-61c4-4e18-96f0-a23795aac963.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x6954fec57b91ca3a2ba6fc0931a322f39dc0ad7bf6434df8edbb9e464fa0fffb","name":"Hằng Cat","registered_at":"2026-06-20T13:35:37Z","symbol":"NIM1621634","token_address":"0xadf5b10cf29a5f8a9b12d52edd997985841d280c","type":"artist","uuid":"b3000033-61c4-4e18-96f0-a23795aac963"}
album: Bỏ Lại Thế Giới
  type: MusicAlbum
  date published: 2017-06-20
  track: Chạm Khẽ Tim Anh Một Chút Thôi
    type: MusicRecording
    duration: PT3M16S
    duration ms: 196545
    explicit: false
    by artist: Hằng Cat
    in album: Bỏ Lại Thế Giới
      type: MusicAlbum
      date published: 2017-06-20
    genre: v-pop
    isrc code: FRX452266076
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T16:06:04+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x041e89bd1baee2c61a28912bd7cc7cabdf39b40e4cc900c9c97892459a025109
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958761
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958761
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX452266076
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T19:06:34Z
    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 0x041e89bd1baee2c61a28912bd7cc7cabdf39b40e4cc900c9c97892459a025109. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:06:34Z), 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/FRX452266076.
      date published: 2026-07-19T19:06:34Z
    audio: Chạm Khẽ Tim Anh Một Chút Thôi
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 135.848
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.569
      additional property: Energy
        type: PropertyValue
        value: 0.304
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.975
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.153
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.325
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.361
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Yêu Là Tha Thu
  type: MusicAlbum
  date published: 2017-06-20
album: Quá Khứ Còn Lại Gì
  type: MusicAlbum
  date published: 2017-11-06
album: Lạc Nhau Có Phải Muôn Đời
  type: MusicAlbum
  date published: 2017-11-06