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type: MusicGroup
genre: classical
genre: japanese classical
popularity: 30
followers: 1243
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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additional property: OTSVerificationAPI
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T19:24:56Z
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album: 子守歌 作品49-4
  type: MusicAlbum
  date published: 2020-11-04
  track: 子守歌 作品49-4
album: SOUVENIR～ドビュッシー＆フランク作品集
  type: MusicAlbum
  date published: 2021-11-05
  track: 美しき夕暮れ（チェロとハープ編）
  track: レントより遅く（チェロとハープ編）
  track: ベルガマスク組曲～第3曲: 月の光（チェロとハープ編）
  track: リート FWV 83
  track: チェロとピアノのためのソナタ ニ短調: 第1楽章: Prologue. Lent
  track: チェロとピアノのためのソナタ ニ短調: 第3楽章: Final. Animé
track: 歌の翼に Op. 34-2(チェロ&ピアノ編)
track: チェロ・ソナタ 第1番 変ロ長調 Op. 45: 第1楽章: Allegro vivace
track: チェロ・ソナタ 第1番 変ロ長調 Op. 45: 第2楽章: Andante
track: 無言歌 Op.109
track: 協奏的変奏曲 ニ長調 Op. 17

子守歌 作品49-4
type: MusicRecording
duration: PT1M57S
duration ms: 117313
explicit: false
by artist: Johannes Brahms
by artist: Haruma Sato
by artist: 大伏啓太
in album: 子守歌 作品49-4
  type: MusicAlbum
  date published: 2020-11-04
popularity: 7
genre: classical
genre: german-romanticism
genre: late-romantic-era
isrc code: JPPO02003377
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-06-13T15:41:10+00:00
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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T18:39:05Z
audio: 子守歌 作品49-4
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美しき夕暮れ（チェロとハープ編）
type: MusicRecording
duration: PT2M23S
duration ms: 143226
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by artist: Claude Debussy
by artist: Haruma Sato
by artist: Naoko Yoshino
in album: SOUVENIR～ドビュッシー＆フランク作品集
  type: MusicAlbum
  date published: 2021-11-05
popularity: 17
genre: classical
genre: impressionism
genre: post-romantic-era
isrc code: JPPO02103903
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-07-02T03:30:09+00:00
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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: 美しき夕暮れ（チェロとハープ編）
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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レントより遅く（チェロとハープ編）
type: MusicRecording
duration: PT4M30S
duration ms: 270640
explicit: false
by artist: Claude Debussy
by artist: Haruma Sato
by artist: Naoko Yoshino
in album: SOUVENIR～ドビュッシー＆フランク作品集
  type: MusicAlbum
  date published: 2021-11-05
popularity: 12
genre: classical
genre: impressionism
genre: post-romantic-era
isrc code: JPPO02103904
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-23T09:25:01+00:00
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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/JPPO02103904
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b859bf4ec49a37eb0bd8ce37848b8b6ad4e854ca73d31ee19f8b3a25a07e30. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPPO02103904.
  date published: 2026-07-02T03:55:08Z
audio: レントより遅く（チェロとハープ編）
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
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ベルガマスク組曲～第3曲: 月の光（チェロとハープ編）
type: MusicRecording
duration: PT4M59S
duration ms: 299533
explicit: false
by artist: Claude Debussy
by artist: Haruma Sato
by artist: Naoko Yoshino
in album: SOUVENIR～ドビュッシー＆フランク作品集
  type: MusicAlbum
  date published: 2021-11-05
popularity: 17
genre: classical
genre: impressionism
genre: post-romantic-era
isrc code: JPPO02103905
additional property: CopyrightID
additional property: CopyrightStatus
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  value: registered
additional property: CopyrightRegisteredAt
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
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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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: ベルガマスク組曲～第3曲: 月の光（チェロとハープ編）
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リート FWV 83
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by artist: Haruma Sato
by artist: 髙木竜馬
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  date published: 2021-11-05
popularity: 31
genre: chamber-music
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
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additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T17:25:41Z
audio: リート FWV 83
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チェロとピアノのためのソナタ ニ短調: 第1楽章: Prologue. Lent
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by artist: Haruma Sato
by artist: 髙木竜馬
in album: SOUVENIR～ドビュッシー＆フランク作品集
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popularity: 2
genre: classical
genre: impressionism
genre: post-romantic-era
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  date published: 2026-07-31T15:59:18Z
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additional property: OTSVerifyInstructions
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チェロとピアノのためのソナタ ニ短調: 第3楽章: Final. Animé
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by artist: Haruma Sato
by artist: 髙木竜馬
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popularity: 1
genre: classical
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  date published: 2026-07-31T00:26:26Z
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歌の翼に Op. 34-2(チェロ&ピアノ編)
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by artist: Haruma Sato
by artist: 久末 航
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additional property: OTSVerifyInstructions
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  date published: 2026-06-13T12:47:07Z
audio: 歌の翼に Op. 34-2(チェロ&ピアノ編)
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チェロ・ソナタ 第1番 変ロ長調 Op. 45: 第1楽章: Allegro vivace
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by artist: Haruma Sato
by artist: 久末 航
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genre: classical
genre: early-romantic-era
genre: german-romanticism
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  date published: 2026-07-31T12:24:41Z
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チェロ・ソナタ 第1番 変ロ長調 Op. 45: 第2楽章: Andante
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by artist: 久末 航
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genre: classical
genre: early-romantic-era
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  date published: 2026-07-31T18:48:12Z
audio: チェロ・ソナタ 第1番 変ロ長調 Op. 45: 第2楽章: Andante
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無言歌 Op.109
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genre: classical
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  date published: 2026-07-30T09:37:10Z
audio: 無言歌 Op.109
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additional property: OTSVerifyInstructions
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協奏的変奏曲 ニ長調 Op. 17
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genre: classical
genre: early-romantic-era
genre: german-romanticism
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-08-01T03:13:03Z
audio: 協奏的変奏曲 ニ長調 Op. 17
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    type: PropertyValue
    value: -25.444
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: JPPO02300519
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960500
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-08-01T03:13:03+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO02300519
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960500
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-08-01T03:13:03+00:00
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