Kass Hart
type: MusicGroup
popularity: 3
followers: 14
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdefb4d0704d95314cdc7557b3dd2235157c5f137413c8cb57b2230a160503ddc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954058
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954058
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/44fb6147-5aed-410d-8a15-3135156ab8e3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/44fb6147-5aed-410d-8a15-3135156ab8e3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/44fb6147-5aed-410d-8a15-3135156ab8e3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T06:34:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdefb4d0704d95314cdc7557b3dd2235157c5f137413c8cb57b2230a160503ddc","name":"Kass Hart","registered_at":"2026-06-16T13:39:52Z","symbol":"NIM1069098","token_address":"0xdd6aef3b944cc3a578b903727635ae1f2b497e51","type":"artist","uuid":"44fb6147-5aed-410d-8a15-3135156ab8e3"}
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 0xdefb4d0704d95314cdc7557b3dd2235157c5f137413c8cb57b2230a160503ddc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44fb6147-5aed-410d-8a15-3135156ab8e3.json and https://artists.proofprofile.net/proofs/artist/44fb6147-5aed-410d-8a15-3135156ab8e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xdefb4d0704d95314cdc7557b3dd2235157c5f137413c8cb57b2230a160503ddc","name":"Kass Hart","registered_at":"2026-06-16T13:39:52Z","symbol":"NIM1069098","token_address":"0xdd6aef3b944cc3a578b903727635ae1f2b497e51","type":"artist","uuid":"44fb6147-5aed-410d-8a15-3135156ab8e3"}
album: Love To Hate You
  type: MusicAlbum
  date published: 2023-09-08
album: MAZE
  type: MusicAlbum
  date published: 2024-02-09
album: One Night Only
  type: MusicAlbum
  date published: 2024-10-25
  track: One Night Only
    type: MusicRecording
    duration: PT3M16S
    duration ms: 196760
    explicit: false
    by artist: Kass Hart
    in album: One Night Only
      type: MusicAlbum
      date published: 2024-10-25
    isrc code: QZTB62431523
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T17:41:31+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x42435d9d658cd32c0bb55fd21fa2f4b4a39ee705d954bc5a2a2504e688fde0c2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956738
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956738
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB62431523
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T04:47:21Z
    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 0x42435d9d658cd32c0bb55fd21fa2f4b4a39ee705d954bc5a2a2504e688fde0c2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB62431523.
      date published: 2026-07-05T04:47:21Z
    audio: One Night Only
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 121.001
      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: 0.854
      additional property: Energy
        type: PropertyValue
        value: 0.66
      additional property: Speechiness
        type: PropertyValue
        value: 0.052
      additional property: Acousticness
        type: PropertyValue
        value: 0.002
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.002
      additional property: Liveness
        type: PropertyValue
        value: 0.112
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.544
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.988
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: BLACK MAGIC
  type: MusicAlbum
  date published: 2025-10-17