矢澤にこ(CV.徳井青空)
type: MusicGroup
popularity: 26
followers: 9576
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc0b637acd6a60e342c2764abfb30a8ad62a07f82439bbdf167fbf87091c1dd07
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42e9850e-a558-4101-8568-9571d9ee07a8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42e9850e-a558-4101-8568-9571d9ee07a8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/42e9850e-a558-4101-8568-9571d9ee07a8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc0b637acd6a60e342c2764abfb30a8ad62a07f82439bbdf167fbf87091c1dd07","name":"矢澤にこ(CV.徳井青空)","registered_at":"2026-06-12T15:15:59Z","symbol":"NIM0087052","token_address":"0x2cfc5f11eaab6f25247d0c2ffe96eb73705c437a","type":"artist","uuid":"42e9850e-a558-4101-8568-9571d9ee07a8"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b637acd6a60e342c2764abfb30a8ad62a07f82439bbdf167fbf87091c1dd07. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42e9850e-a558-4101-8568-9571d9ee07a8.json and https://artists.proofprofile.net/proofs/artist/42e9850e-a558-4101-8568-9571d9ee07a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xc0b637acd6a60e342c2764abfb30a8ad62a07f82439bbdf167fbf87091c1dd07","name":"矢澤にこ(CV.徳井青空)","registered_at":"2026-06-12T15:15:59Z","symbol":"NIM0087052","token_address":"0x2cfc5f11eaab6f25247d0c2ffe96eb73705c437a","type":"artist","uuid":"42e9850e-a558-4101-8568-9571d9ee07a8"}
album: ラブライブ！ Solo Live! Collection from μ's 矢澤にこ スマイル・フォー・ユー♡
  type: MusicAlbum
  date published: 2012-02-19
  track: 友情ノーチェンジ - NICO Mix
    type: MusicRecording
    duration: PT4M15S
    duration ms: 255386
    explicit: false
    by artist: 矢澤にこ(CV.徳井青空)
    in album: ラブライブ！ Solo Live! Collection from μ's 矢澤にこ スマイル・フォー・ユー♡
      type: MusicAlbum
      date published: 2012-02-19
    isrc code: JPI101200199
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T02:47:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x56a33dc48e10740e1d9889e3221f6e4c54869d62b6303357673371401fe6a85c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958480
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958480
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPI101200199
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T02:58:58Z
    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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a33dc48e10740e1d9889e3221f6e4c54869d62b6303357673371401fe6a85c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPI101200199.
      date published: 2026-07-18T02:58:58Z
    audio: 友情ノーチェンジ - NICO Mix
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 140.059
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.673
      additional property: Energy
        type: PropertyValue
        value: 0.992
      additional property: Speechiness
        type: PropertyValue
        value: 0.101
      additional property: Acousticness
        type: PropertyValue
        value: 0.062
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.336
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.714
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.44
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: ラブライブ！ Solo Live! Collection from μ's 矢澤にこ スマイル・フォー・ユー♡
  type: MusicAlbum
  date published: 2012-02-19
album: 乙女式れんあい塾
  type: MusicAlbum
  date published: 2012-05-23
album: ラブライブ!Solo Live! collection Memories with Nico
  type: MusicAlbum
  date published: 2018-03-28
album: ラブライブ!Solo Live! from μ's 矢澤にこ Extra
  type: MusicAlbum
  date published: 2020-09-09