Honoka Hasegawa
type: MusicGroup
genre: classical piano
popularity: 5
followers: 22
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x65f696d685f801a6a9378265c379eb662071eea49b9b8448c8e2f0c3a5551a22
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 953864
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953864
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0452650f-80ec-43ef-98ce-ead6177cf90b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0452650f-80ec-43ef-98ce-ead6177cf90b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0452650f-80ec-43ef-98ce-ead6177cf90b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T00:30:31Z
additional property: OTSCanonicalRecord
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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 0x65f696d685f801a6a9378265c379eb662071eea49b9b8448c8e2f0c3a5551a22. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0452650f-80ec-43ef-98ce-ead6177cf90b.json and https://artists.proofprofile.net/proofs/artist/0452650f-80ec-43ef-98ce-ead6177cf90b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:39:16Z
  text: {"copyright_id":"0x65f696d685f801a6a9378265c379eb662071eea49b9b8448c8e2f0c3a5551a22","name":"Honoka Hasegawa","registered_at":"2026-06-15T15:01:37Z","symbol":"NIM0744906","token_address":"0x5d1b704a10b436594398cbf5393719d034726b78","type":"artist","uuid":"0452650f-80ec-43ef-98ce-ead6177cf90b"}
album: Tchaikovsky: The Seasons
  type: MusicAlbum
  date published: 2019-06-03
album: Mussorgsky: Pictures at an Exhibition
  type: MusicAlbum
  date published: 2019-06-07
album: Clementi: Six Piano Sonatinas Opus 36
  type: MusicAlbum
  date published: 2019-06-28
album: Schumann: Kinderszenen
  type: MusicAlbum
  date published: 2019-07-16
  track: Kinderszenen, Op. 15: 12. Kind im Einschlummern (Child Falling Asleep)
    type: MusicRecording
    duration: PT1M23S
    duration ms: 83361
    explicit: false
    by artist: Honoka Hasegawa
    in album: Schumann: Kinderszenen
      type: MusicAlbum
      date published: 2019-07-16
    genre: classical piano
    isrc code: GBSMU6650008
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
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    additional property: CopyrightChainExplorerURL
      type: PropertyValue
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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      value: 958324
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958324
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6650008
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T23:54:25Z
    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 0xeb97507f7a975b3d5fe544be3dadf267bfd5e4a921f9c220346a5966ec0507c1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:54:25Z), 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/GBSMU6650008.
      date published: 2026-07-16T23:54:25Z
    audio: Kinderszenen, Op. 15: 12. Kind im Einschlummern (Child Falling Asleep)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 99.047
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.477
      additional property: Energy
        type: PropertyValue
        value: 0.012
      additional property: Speechiness
        type: PropertyValue
        value: 0.057
      additional property: Acousticness
        type: PropertyValue
        value: 0.996
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.896
      additional property: Liveness
        type: PropertyValue
        value: 0.085
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.286
      additional property: Loudness (dB)
        type: PropertyValue
        value: -33.335
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Albéniz: Suite Española
  type: MusicAlbum
  date published: 2019-07-18
album: Albéniz: España
  type: MusicAlbum
  date published: 2019-07-19