Katze Blau
type: MusicGroup
popularity: 5
followers: 554
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2f303a5a562aaf676c02274d61865015818237b65a1366ce5140dbd18cb32a27
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7fd626da-7be2-4760-bcca-5230e40f44ee.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7fd626da-7be2-4760-bcca-5230e40f44ee.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7fd626da-7be2-4760-bcca-5230e40f44ee
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2f303a5a562aaf676c02274d61865015818237b65a1366ce5140dbd18cb32a27","name":"Katze Blau","registered_at":"2026-06-17T10:35:27Z","symbol":"NIM1368634","token_address":"0xfc9a8a4adcdd121f41bb391f5719f37f0aa98647","type":"artist","uuid":"7fd626da-7be2-4760-bcca-5230e40f44ee"}
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 0x2f303a5a562aaf676c02274d61865015818237b65a1366ce5140dbd18cb32a27. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fd626da-7be2-4760-bcca-5230e40f44ee.json and https://artists.proofprofile.net/proofs/artist/7fd626da-7be2-4760-bcca-5230e40f44ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x2f303a5a562aaf676c02274d61865015818237b65a1366ce5140dbd18cb32a27","name":"Katze Blau","registered_at":"2026-06-17T10:35:27Z","symbol":"NIM1368634","token_address":"0xfc9a8a4adcdd121f41bb391f5719f37f0aa98647","type":"artist","uuid":"7fd626da-7be2-4760-bcca-5230e40f44ee"}
album: The Way We Live
  type: MusicAlbum
  date published: 2016-08-11
album: The Way We Live
  type: MusicAlbum
  date published: 2016-08-11
album: Blue Heart
  type: MusicAlbum
  date published: 2018-07-20
album: Blue Hearts
  type: MusicAlbum
  date published: 2018-08-17
  track: Blue Heart
    type: MusicRecording
    duration: PT3M14S
    duration ms: 194026
    explicit: false
    by artist: Katze Blau
    in album: Blue Hearts
      type: MusicAlbum
      date published: 2018-08-17
    isrc code: DEUA31800206
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T16:17:11+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xab09210ffcfba8f8ed797aa3c5c0cc0c0b2df0b591b4ae44f0cc94280b7bcce4
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958180
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958180
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUA31800206
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T19:19:39Z
    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 0xab09210ffcfba8f8ed797aa3c5c0cc0c0b2df0b591b4ae44f0cc94280b7bcce4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:39Z), 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/DEUA31800206.
      date published: 2026-07-15T19:19:39Z
    audio: Blue Heart
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 114.999
      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: 0.765
      additional property: Energy
        type: PropertyValue
        value: 0.726
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.052
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.222
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.657
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.36
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: When I'm with You
  type: MusicAlbum
  date published: 2020-03-20
album: Soft Awake
  type: MusicAlbum
  date published: 2021-02-19
album: Soft Awake
  type: MusicAlbum
  date published: 2022-06-22
album: Way We Live
  type: MusicAlbum
  date published: 2022-06-22
album: Smile
  type: MusicAlbum
  date published: 2022-06-22