飯田 晟矢
type: MusicGroup
genre: vocaloid
popularity: 3
followers: 101
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 953909
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953909
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/18294c6c-df30-4187-9461-1b1ac82f9690.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/18294c6c-df30-4187-9461-1b1ac82f9690.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-06-16T07:53:13Z
additional property: OTSCanonicalRecord
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additional property: OTSVerifyInstructions
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  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 0x1c624da0b2ed4e70467e7b2107787282c0f6971bd88c54cb1ef665ec945fe2d5. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18294c6c-df30-4187-9461-1b1ac82f9690.json and https://artists.proofprofile.net/proofs/artist/18294c6c-df30-4187-9461-1b1ac82f9690.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x1c624da0b2ed4e70467e7b2107787282c0f6971bd88c54cb1ef665ec945fe2d5","name":"飯田 晟矢","registered_at":"2026-06-15T22:01:44Z","symbol":"NIM0845132","token_address":"0xa0f77198573cb1c98b2b633e7064c143982cf7c8","type":"artist","uuid":"18294c6c-df30-4187-9461-1b1ac82f9690"}
album: Concentration and relaxation
  type: MusicAlbum
  date published: 2021-02-19
album: お休み
  type: MusicAlbum
  date published: 2021-03-03
album: Concentration and relaxation 2
  type: MusicAlbum
  date published: 2021-03-17
album: Concentration and relaxation 3
  type: MusicAlbum
  date published: 2021-06-02
album: ピアノの詩
  type: MusicAlbum
  date published: 2021-10-22
album: Day today
  type: MusicAlbum
  date published: 2021-10-27
album: Goodbye summer.
  type: MusicAlbum
  date published: 2021-10-28
album: A moment
  type: MusicAlbum
  date published: 2021-10-29
album: Rain and friends
  type: MusicAlbum
  date published: 2021-10-29
album: Make noon
  type: MusicAlbum
  date published: 2021-11-05
album: Eternal recall
  type: MusicAlbum
  date published: 2021-11-05
album: Quick Re.
  type: MusicAlbum
  date published: 2021-11-05
album: Place of memories
  type: MusicAlbum
  date published: 2021-11-16
album: Sigma
  type: MusicAlbum
  date published: 2021-11-30
album: cassette off
  type: MusicAlbum
  date published: 2022-04-22
album: Mind focus
  type: MusicAlbum
  date published: 2022-04-22
album: EEE8
  type: MusicAlbum
  date published: 2022-04-22
album: Return of the soul.
  type: MusicAlbum
  date published: 2022-04-25
album: Holidays
  type: MusicAlbum
  date published: 2022-05-18
album: bit bi b
  type: MusicAlbum
  date published: 2022-12-16
album: Water 15
  type: MusicAlbum
  date published: 2022-12-22
album: コワレタセカイ
  type: MusicAlbum
  date published: 2023-01-23
album: Focus
  type: MusicAlbum
  date published: 2023-01-23
album: 雨焦ガレ
  type: MusicAlbum
  date published: 2023-01-27
album: 言葉
  type: MusicAlbum
  date published: 2023-02-16
album: あの日の夢のこと
  type: MusicAlbum
  date published: 2023-04-14
album: あの日の夢のこと (arrange 2306 Ver.)
  type: MusicAlbum
  date published: 2023-07-06
album: 部屋
  type: MusicAlbum
  date published: 2023-08-25
album: 旅立ちの内時
  type: MusicAlbum
  date published: 2023-11-17
album: 部屋 (EPIC MOD)
  type: MusicAlbum
  date published: 2023-11-24
album: 言葉のない世界
  type: MusicAlbum
  date published: 2024-01-26
album: Vocal Album.1
  type: MusicAlbum
  date published: 2024-04-17
album: For Be Rock
  type: MusicAlbum
  date published: 2024-06-27
album: レクイエット feat. 夢ノ結唱 ROSE
  type: MusicAlbum
  date published: 2024-07-29
album: あれから僕は feat. Mai
  type: MusicAlbum
  date published: 2024-09-13
album: 後悔
  type: MusicAlbum
  date published: 2024-10-28
album: 砂時計
  type: MusicAlbum
  date published: 2025-01-27
  track: 砂時計
    type: MusicRecording
    duration: PT4M11S
    duration ms: 251675
    explicit: false
    by artist: 飯田 晟矢
    in album: 砂時計
      type: MusicAlbum
      date published: 2025-01-27
    genre: vocaloid
    isrc code: JPW462513894
    additional property: CopyrightID
    additional property: CopyrightStatus
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462513894
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T16:59:47Z
    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 0x0e6a1ecc32b004cec48d6c7cc7b5651648abd346e3f1078933b95e9252007990. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPW462513894 — a six-check JSON result.
      date published: 2026-07-21T16:59:47Z
    audio: 砂時計
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 184.947
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: The meaning of life.
album: 透明な日々の中で

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.524

Energy
type: PropertyValue
value: 0.905

Speechiness
type: PropertyValue
value: 0.046

Acousticness
type: PropertyValue
value: 0.002

Instrumentalness
type: PropertyValue
value: 0.001

Liveness
type: PropertyValue
value: 0.074

Valence (Positivity)
type: PropertyValue
value: 0.752

Loudness (dB)
type: PropertyValue
value: -9.288

Key Name
type: PropertyValue
value: A

Mode Name
type: PropertyValue
value: Minor

The meaning of life.
type: MusicAlbum
date published: 2025-08-01

透明な日々の中で
type: MusicAlbum
date published: 2025-09-26