カグラナナ
type: MusicGroup
genre: vocaloid
popularity: 19
followers: 2322
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdc903db3d354b80fa9e0f5648f9103ec4e06cb35125c5bd3332e9498daba871b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953641
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953641
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/39abe1f8-1688-4101-b18e-d216d47dc7b4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/39abe1f8-1688-4101-b18e-d216d47dc7b4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/39abe1f8-1688-4101-b18e-d216d47dc7b4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T13:54:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdc903db3d354b80fa9e0f5648f9103ec4e06cb35125c5bd3332e9498daba871b","name":"カグラナナ","registered_at":"2026-06-14T10:29:59Z","symbol":"NIM0424759","token_address":"0x19153cf3cd965bd6c5ed5efc1acbbc359b1b5cf9","type":"artist","uuid":"39abe1f8-1688-4101-b18e-d216d47dc7b4"}
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 0xdc903db3d354b80fa9e0f5648f9103ec4e06cb35125c5bd3332e9498daba871b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39abe1f8-1688-4101-b18e-d216d47dc7b4.json and https://artists.proofprofile.net/proofs/artist/39abe1f8-1688-4101-b18e-d216d47dc7b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T15:20:52Z
  text: {"copyright_id":"0xdc903db3d354b80fa9e0f5648f9103ec4e06cb35125c5bd3332e9498daba871b","name":"カグラナナ","registered_at":"2026-06-14T10:29:59Z","symbol":"NIM0424759","token_address":"0x19153cf3cd965bd6c5ed5efc1acbbc359b1b5cf9","type":"artist","uuid":"39abe1f8-1688-4101-b18e-d216d47dc7b4"}
album: 鼓動 (TV size)
  type: MusicAlbum
  date published: 2021-07-02
  track: 鼓動 - TV size
    type: MusicRecording
    duration: PT1M31S
    duration ms: 91211
    explicit: false
    by artist: カグラナナ
    in album: 鼓動 (TV size)
      type: MusicAlbum
      date published: 2021-07-02
    genre: vocaloid
    isrc code: TCJPP2108438
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T08:11:25+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x11817d07b7f44218d2fd5a790e9200147876dbfa6bf889d50d9ad0e412092ec5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956639
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956639
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPP2108438
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T11:19:20Z
    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 0x11817d07b7f44218d2fd5a790e9200147876dbfa6bf889d50d9ad0e412092ec5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPP2108438.
      date published: 2026-07-04T11:19:20Z
    audio: 鼓動 - TV size
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 179.915
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.516
      additional property: Energy
        type: PropertyValue
        value: 0.56
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.66
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.231
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.865
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.952
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 鼓動
  type: MusicAlbum
  date published: 2021-08-01
album: Astrolabe
  type: MusicAlbum
  date published: 2023-08-17
album: 青のすみか (Cover)
  type: MusicAlbum
  date published: 2025-07-07
  track: 青のすみか - Cover
    type: MusicRecording
    duration: PT3M15S
    duration ms: 195098
    explicit: false
    by artist: カグラナナ
    in album: 青のすみか (Cover)
      type: MusicAlbum
      date published: 2025-07-07
    genre: vocaloid
    isrc code: JPS532500319
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T08:33:30+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x408dc11f17ce013ce654b2695216b68b0d6f55be35497a5d8a8c38118c4d485d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958853
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958853
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPS532500319
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T11:35:27Z
    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 0x408dc11f17ce013ce654b2695216b68b0d6f55be35497a5d8a8c38118c4d485d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:27Z), 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/JPS532500319.
      date published: 2026-07-20T11:35:27Z
    audio: 青のすみか - Cover
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 152.013
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.532
      additional property: Energy
        type: PropertyValue
        value: 0.884
      additional property: Speechiness
        type: PropertyValue
        value: 0.1
      additional property: Acousticness
        type: PropertyValue
        value: 0.095
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.261

Valence (Positivity)
type: PropertyValue
value: 0.653

Loudness (dB)
type: PropertyValue
value: -6.541

Key Name
type: PropertyValue
value: F

Mode Name
type: PropertyValue
value: Major