Kazuei Acoustic Cafe
type: MusicGroup
popularity: 3
followers: 64
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa7c95da9621ec7d05e32176a7cf2bcc074dbfae0e2bbd6764170f3027a2e1e1c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/95ac04c2-3b25-4acb-987e-0ab3050ea5ee.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/95ac04c2-3b25-4acb-987e-0ab3050ea5ee.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/95ac04c2-3b25-4acb-987e-0ab3050ea5ee
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa7c95da9621ec7d05e32176a7cf2bcc074dbfae0e2bbd6764170f3027a2e1e1c","name":"Kazuei Acoustic Cafe","registered_at":"2026-06-17T17:55:46Z","symbol":"NIM1473641","token_address":"0x242fdc569de8b27f9f9448ab35112c834db25a89","type":"artist","uuid":"95ac04c2-3b25-4acb-987e-0ab3050ea5ee"}
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 0xa7c95da9621ec7d05e32176a7cf2bcc074dbfae0e2bbd6764170f3027a2e1e1c. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95ac04c2-3b25-4acb-987e-0ab3050ea5ee.json and https://artists.proofprofile.net/proofs/artist/95ac04c2-3b25-4acb-987e-0ab3050ea5ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0xa7c95da9621ec7d05e32176a7cf2bcc074dbfae0e2bbd6764170f3027a2e1e1c","name":"Kazuei Acoustic Cafe","registered_at":"2026-06-17T17:55:46Z","symbol":"NIM1473641","token_address":"0x242fdc569de8b27f9f9448ab35112c834db25a89","type":"artist","uuid":"95ac04c2-3b25-4acb-987e-0ab3050ea5ee"}
album: Kazuei Acoustic Cafe
  type: MusicAlbum
  date published: 2024-06-03
  track: Summer Walk
    type: MusicRecording
    duration: PT2M54S
    duration ms: 174437
    explicit: false
    by artist: Kazuei Acoustic Cafe
    in album: Kazuei Acoustic Cafe
      type: MusicAlbum
      date published: 2024-06-03
    isrc code: JP92G2416925
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T12:04:20+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x31e98878a5bc7dc7549311d2c4ecd91c8cca29be3d83acfd08b14cf5e856f650
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92G2416925
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x31e98878a5bc7dc7549311d2c4ecd91c8cca29be3d83acfd08b14cf5e856f650. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JP92G2416925.
      date published: 2026-07-05T01:12:41Z
    audio: Summer Walk
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 140.025
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.923
      additional property: Energy
        type: PropertyValue
        value: 0.14
      additional property: Speechiness
        type: PropertyValue
        value: 0.068
      additional property: Acousticness
        type: PropertyValue
        value: 0.387
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.899
      additional property: Liveness
        type: PropertyValue
        value: 0.099
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.755
      additional property: Loudness (dB)
        type: PropertyValue
        value: -26.642
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor