Ninja Cafe
type: MusicGroup
popularity: 9
followers: 133
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x84d922d7efecc4f3c64bb04f5ef8e5dae7f3b444421af0ec7b6aa92a7ef1300b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/73e721d8-a4c5-48a0-88c2-e6cc1c1351f2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/73e721d8-a4c5-48a0-88c2-e6cc1c1351f2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/73e721d8-a4c5-48a0-88c2-e6cc1c1351f2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x84d922d7efecc4f3c64bb04f5ef8e5dae7f3b444421af0ec7b6aa92a7ef1300b","name":"Ninja Cafe","registered_at":"2026-06-17T05:59:18Z","symbol":"NIM1302813","token_address":"0x1929e90ab679e5fccfc050d2c14dd757e31802f4","type":"artist","uuid":"73e721d8-a4c5-48a0-88c2-e6cc1c1351f2"}
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 0x84d922d7efecc4f3c64bb04f5ef8e5dae7f3b444421af0ec7b6aa92a7ef1300b. 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/73e721d8-a4c5-48a0-88c2-e6cc1c1351f2.json and https://artists.proofprofile.net/proofs/artist/73e721d8-a4c5-48a0-88c2-e6cc1c1351f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x84d922d7efecc4f3c64bb04f5ef8e5dae7f3b444421af0ec7b6aa92a7ef1300b","name":"Ninja Cafe","registered_at":"2026-06-17T05:59:18Z","symbol":"NIM1302813","token_address":"0x1929e90ab679e5fccfc050d2c14dd757e31802f4","type":"artist","uuid":"73e721d8-a4c5-48a0-88c2-e6cc1c1351f2"}
album: Ghibli Jazz - Vibraphone-
  type: MusicAlbum
  date published: 2023-11-07
album: ディズニー・ジャズ ～ビブラフォン～
  type: MusicAlbum
  date published: 2023-11-07
  track: リメンバー・ミー (『リメンバー・ミー』より)
    type: MusicRecording
    duration: PT3M41S
    duration ms: 221007
    explicit: false
    by artist: Ninja Cafe
    in album: ディズニー・ジャズ ～ビブラフォン～
      type: MusicAlbum
      date published: 2023-11-07
    isrc code: JPU362350908
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T02:13:17+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x545eddc107ea63bd5e0e867f4938bd206e98dbbb331ee3756881908581777d7a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956772
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956772
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU362350908
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T10:01:46Z
    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 0x545eddc107ea63bd5e0e867f4938bd206e98dbbb331ee3756881908581777d7a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPU362350908.
      date published: 2026-07-05T10:01:46Z
    audio: リメンバー・ミー (『リメンバー・ミー』より)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 69.992
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.544
      additional property: Energy
        type: PropertyValue
        value: 0.343
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.864
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.895
      additional property: Liveness
        type: PropertyValue
        value: 0.139
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.35
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.305
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: ジブリ・ジャズ ～ビブラフォン～
  type: MusicAlbum
  date published: 2023-11-07
album: Disney Jazz - Vibraphone-
  type: MusicAlbum
  date published: 2023-11-07
  track: Remember Me (From "Coco")
    type: MusicRecording
    duration: PT3M41S
    duration ms: 221007
    explicit: false
    by artist: Ninja Cafe
    in album: Disney Jazz - Vibraphone-
      type: MusicAlbum
      date published: 2023-11-07
    isrc code: JPU362350908
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T02:13:17+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x545eddc107ea63bd5e0e867f4938bd206e98dbbb331ee3756881908581777d7a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956772
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956772
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU362350908
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T10:01:46Z
    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 0x545eddc107ea63bd5e0e867f4938bd206e98dbbb331ee3756881908581777d7a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPU362350908.
      date published: 2026-07-05T10:01:46Z
    audio: Remember Me (From "Coco")
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 69.992
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.544
      additional property: Energy
        type: PropertyValue
        value: 0.343
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.864
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.895
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Liveness
type: PropertyValue
value: 0.139

Valence (Positivity)
type: PropertyValue
value: 0.35

Loudness (dB)
type: PropertyValue
value: -14.305

Key Name
type: PropertyValue
value: Bb

Mode Name
type: PropertyValue
value: Major