高海千歌 (CV.伊波杏樹) from Aqours
type: MusicGroup
popularity: 16
followers: 9331
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x75af9d22c08b955f4861bb0407fd86ad314c7d68b199148f9717ede480fcaa3d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953786
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953786
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d8dd35d9-d709-4468-8d6c-7d60873351ad.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d8dd35d9-d709-4468-8d6c-7d60873351ad.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d8dd35d9-d709-4468-8d6c-7d60873351ad
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T12:56:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x75af9d22c08b955f4861bb0407fd86ad314c7d68b199148f9717ede480fcaa3d","name":"高海千歌 (CV.伊波杏樹) from Aqours","registered_at":"2026-06-15T03:18:04Z","symbol":"NIM0665299","token_address":"0x4a03ab2ac88b13609fb8710db7c5f155986acc55","type":"artist","uuid":"d8dd35d9-d709-4468-8d6c-7d60873351ad"}
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 0x75af9d22c08b955f4861bb0407fd86ad314c7d68b199148f9717ede480fcaa3d. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8dd35d9-d709-4468-8d6c-7d60873351ad.json and https://artists.proofprofile.net/proofs/artist/d8dd35d9-d709-4468-8d6c-7d60873351ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T12:56:12Z
  text: {"copyright_id":"0x75af9d22c08b955f4861bb0407fd86ad314c7d68b199148f9717ede480fcaa3d","name":"高海千歌 (CV.伊波杏樹) from Aqours","registered_at":"2026-06-15T03:18:04Z","symbol":"NIM0665299","token_address":"0x4a03ab2ac88b13609fb8710db7c5f155986acc55","type":"artist","uuid":"d8dd35d9-d709-4468-8d6c-7d60873351ad"}
album: LoveLive! Sunshine!! Takami Chika First Solo Concert Album 〜One More Sunshine Story〜
  type: MusicAlbum
  date published: 2020-08-01
album: LoveLive! Sunshine!! Second Solo Concert Album ～THE STORY OF FEATHER～ starring Takami Chika
  type: MusicAlbum
  date published: 2021-08-01
  track: OKAWARI Happy life!
    type: MusicRecording
    duration: PT3M56S
    duration ms: 236600
    explicit: false
    by artist: 高海千歌 (CV.伊波杏樹) from Aqours
    in album: LoveLive! Sunshine!! Second Solo Concert Album ～THE STORY OF FEATHER～ starring Takami Chika
      type: MusicAlbum
      date published: 2021-08-01
    isrc code: JPI102101769
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe72d7742bad98e21c74179f780983a2065eeab65dc22548ed86a0c7a2bd52a21
    additional property: OTSHash
    additional property: OTSBitcoinBlock
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      value: 958690
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958690
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPI102101769
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T07:14:39Z
    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 0xe72d7742bad98e21c74179f780983a2065eeab65dc22548ed86a0c7a2bd52a21. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPI102101769.
      date published: 2026-07-19T07:14:39Z
    audio: OKAWARI Happy life!
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 95.019
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.541
      additional property: Energy
        type: PropertyValue
        value: 0.901
      additional property: Speechiness
        type: PropertyValue
        value: 0.084
      additional property: Acousticness
        type: PropertyValue
        value: 0.043
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.224
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.766
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.09
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: LoveLive! Sunshine!! Second Solo Concert Album ～THE STORY OF FEATHER～ starring Takami Chika
  type: MusicAlbum
  date published: 2021-08-01
  track: OKAWARI Happy life!
    type: MusicRecording
    duration: PT3M56S
    duration ms: 236600
    explicit: false
    by artist: 高海千歌 (CV.伊波杏樹) from Aqours
    in album: LoveLive! Sunshine!! Second Solo Concert Album ～THE STORY OF FEATHER～ starring Takami Chika
      type: MusicAlbum
      date published: 2021-08-01
    isrc code: JPI102101769
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T09:12:56+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xe72d7742bad98e21c74179f780983a2065eeab65dc22548ed86a0c7a2bd52a21
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958444
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958444
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPI102101769
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T19:12:23Z
    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 0xe72d7742bad98e21c74179f780983a2065eeab65dc22548ed86a0c7a2bd52a21. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPI102101769.
      date published: 2026-07-17T19:12:23Z
    audio: OKAWARI Happy life!
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 95.019
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.541
      additional property: Energy
        type: PropertyValue
        value: 0.901
      additional property: Speechiness
        type: PropertyValue
        value: 0.084
      additional property: Acousticness
        type: PropertyValue
        value: 0.043
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.224
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Valence (Positivity)
type: PropertyValue
value: 0.766

Loudness (dB)
type: PropertyValue
value: -3.09

Key Name
type: PropertyValue
value: A

Mode Name
type: PropertyValue
value: Major