七花少女
type: MusicGroup
popularity: 5
followers: 1741
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa3bb7db0db007c42d2f7a8d4f46d1527103f3103dc89ea8a7fb69e35b684d7db
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954500
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c0a3d03-fb68-4212-81ff-2f307fd81a8b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c0a3d03-fb68-4212-81ff-2f307fd81a8b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9c0a3d03-fb68-4212-81ff-2f307fd81a8b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T04:47:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa3bb7db0db007c42d2f7a8d4f46d1527103f3103dc89ea8a7fb69e35b684d7db","name":"七花少女","registered_at":"2026-06-20T03:58:15Z","symbol":"NIM1505084","token_address":"0x560b1c8240de0ef07922266f71b6c7b6c80a5ffb","type":"artist","uuid":"9c0a3d03-fb68-4212-81ff-2f307fd81a8b"}
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 0xa3bb7db0db007c42d2f7a8d4f46d1527103f3103dc89ea8a7fb69e35b684d7db. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c0a3d03-fb68-4212-81ff-2f307fd81a8b.json and https://artists.proofprofile.net/proofs/artist/9c0a3d03-fb68-4212-81ff-2f307fd81a8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T05:07:36Z
  text: {"copyright_id":"0xa3bb7db0db007c42d2f7a8d4f46d1527103f3103dc89ea8a7fb69e35b684d7db","name":"七花少女","registered_at":"2026-06-20T03:58:15Z","symbol":"NIM1505084","token_address":"0x560b1c8240de0ef07922266f71b6c7b6c80a5ffb","type":"artist","uuid":"9c0a3d03-fb68-4212-81ff-2f307fd81a8b"}
album: 花咲キオトメ
  type: MusicAlbum
  date published: 2019-03-20
  track: 花咲キオトメ
    type: MusicRecording
    duration: PT3M45S
    duration ms: 225266
    explicit: false
    by artist: 七花少女
    in album: 花咲キオトメ
      type: MusicAlbum
      date published: 2019-03-20
    isrc code: JPVI01900239
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T22:27:10+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd2ad8e5522a06fbd2c56960103687592d7529de2e7b1ef84ba53be37775dcf03
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956857
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956857
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI01900239
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:26:17Z
    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 0xd2ad8e5522a06fbd2c56960103687592d7529de2e7b1ef84ba53be37775dcf03. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPVI01900239.
      date published: 2026-07-06T01:26:17Z
    audio: 花咲キオトメ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 172.122
      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: 0.496
      additional property: Energy
        type: PropertyValue
        value: 0.887
      additional property: Speechiness
        type: PropertyValue
        value: 0.039
      additional property: Acousticness
        type: PropertyValue
        value: 0.045
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.005
      additional property: Liveness
        type: PropertyValue
        value: 0.3
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.729
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.272
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: マイ・グラデイション／SCARLET
  type: MusicAlbum
  date published: 2019-12-04
album: 秋の空とこころ コスモス
  type: MusicAlbum
  date published: 2021-12-14
album: トゲノスキマ
  type: MusicAlbum
  date published: 2025-04-17