夏山よつぎ
type: MusicGroup
genre: vocaloid
popularity: 27
followers: 7519
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x810dfdf3e388aa67b607e8836bb934146cc162c644494cd2f402937464b28b76
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/f93904cd-0d10-4cf7-82a4-5878794aa995.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f93904cd-0d10-4cf7-82a4-5878794aa995.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f93904cd-0d10-4cf7-82a4-5878794aa995
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x810dfdf3e388aa67b607e8836bb934146cc162c644494cd2f402937464b28b76","name":"夏山よつぎ","registered_at":"2026-06-12T14:09:37Z","symbol":"NIM0321193","token_address":"0xe011a8e4688604902fa50128c482c451fc856291","type":"artist","uuid":"f93904cd-0d10-4cf7-82a4-5878794aa995"}
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 0x810dfdf3e388aa67b607e8836bb934146cc162c644494cd2f402937464b28b76. 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/f93904cd-0d10-4cf7-82a4-5878794aa995.json and https://artists.proofprofile.net/proofs/artist/f93904cd-0d10-4cf7-82a4-5878794aa995.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x810dfdf3e388aa67b607e8836bb934146cc162c644494cd2f402937464b28b76","name":"夏山よつぎ","registered_at":"2026-06-12T14:09:37Z","symbol":"NIM0321193","token_address":"0xe011a8e4688604902fa50128c482c451fc856291","type":"artist","uuid":"f93904cd-0d10-4cf7-82a4-5878794aa995"}
album: 夜離れ
  type: MusicAlbum
  date published: 2020-03-23
album: 夜離れ
  type: MusicAlbum
  date published: 2020-03-23
album: 夜離れ
  type: MusicAlbum
  date published: 2020-04-11
album: カミサマホリック
  type: MusicAlbum
  date published: 2020-04-21
album: カミサマホリック
  type: MusicAlbum
  date published: 2020-04-21
album: カラクリ逃亡劇
  type: MusicAlbum
  date published: 2020-05-15
album: カラクリ逃亡劇
  type: MusicAlbum
  date published: 2020-05-15
album: 半透明ピエロ
  type: MusicAlbum
  date published: 2020-06-23
album: 半透明ピエロ
  type: MusicAlbum
  date published: 2020-06-23
album: ノンフィクショントポロジー
  type: MusicAlbum
  date published: 2020-07-08
album: ノンフィクショントポロジー
  type: MusicAlbum
  date published: 2020-07-08
album: マリオネット世に憚る
  type: MusicAlbum
  date published: 2020-07-27
album: マリオネット世に憚る
  type: MusicAlbum
  date published: 2020-07-27
album: ミメシス
  type: MusicAlbum
  date published: 2020-09-02
album: ミメシス
  type: MusicAlbum
  date published: 2020-09-02
album: テンミニッツ・カジノ
  type: MusicAlbum
  date published: 2020-10-03
album: テンミニッツ・カジノ
  type: MusicAlbum
  date published: 2020-10-03
album: アカイライワズライ
  type: MusicAlbum
  date published: 2020-11-21
album: アカイライワズライ
  type: MusicAlbum
  date published: 2020-11-21
album: 五月雨プロローグ
  type: MusicAlbum
  date published: 2020-12-11
album: 五月雨プロローグ
  type: MusicAlbum
  date published: 2020-12-11
album: 吸欠鬼
  type: MusicAlbum
  date published: 2021-02-03
album: 吸欠鬼
  type: MusicAlbum
  date published: 2021-02-03
album: ［トーキョーモンスターガーデン］
  type: MusicAlbum
  date published: 2021-02-18
album: ［トーキョーモンスターガーデン］
  type: MusicAlbum
  date published: 2021-02-18
album: ミラーボーイ
  type: MusicAlbum
  date published: 2021-04-25
album: ミラーボーイ
  type: MusicAlbum
  date published: 2021-04-25
album: ブラッディ・ナイトパーティ
  type: MusicAlbum
  date published: 2021-06-06
album: ブラッディ・ナイトパーティ
  type: MusicAlbum
  date published: 2021-06-06
album: レメディ・レディ
  type: MusicAlbum
  date published: 2021-07-21
album: レメディ・レディ
  type: MusicAlbum
  date published: 2021-07-21
album: 機械の脈動がきこえる
  type: MusicAlbum
  date published: 2021-11-20
album: 機械の脈動がきこえる
  type: MusicAlbum
  date published: 2021-11-20
  track: 半透明ピエロ
    type: MusicRecording
    duration: PT2M49S
    duration ms: 169031
    explicit: false
    by artist: 夏山よつぎ
    in album: 機械の脈動がきこえる
      type: MusicAlbum
      date published: 2021-11-20
    genre: vocaloid
    isrc code: JPX562100139
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T00:09:38+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9e058500f6e8e63211ca9efbf0aa8e512df2cab294cbd5d4c8619582f03dd23d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958802
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958802
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX562100139
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T03:07:50Z
    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 0x9e058500f6e8e63211ca9efbf0aa8e512df2cab294cbd5d4c8619582f03dd23d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:07:50Z), 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/JPX562100139.
      date published: 2026-07-20T03:07:50Z
    audio: 半透明ピエロ
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 160.014
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.529
      additional property: Energy
        type: PropertyValue
        value: 0.98
      additional property: Speechiness
        type: PropertyValue
        value: 0.073
      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: Ms. Clown Snowwhite
album: ミスクラウン・スノーホワイト
album: エンドレス・スヌーズ
album: 東京ナイトホーク
album: 染み付いて幸福
album: アリスのマジカルハッピーワールド
album: ウィングレス・エンゼル
album: メリー・アンバースデー
album: さよなら、ネバーランド
album: トップ・ノッチ・スノッブ
album: ラスト・ラヴソング
album: わちゃちゃむ!
album: 感情は旋律のなかに
album: Emotions in the melody
album: ころしちゃった!
album: Winter: No.19
album: グッバイ、カタルシスター
album: ヴィラン・ラ・ラヴィン
album: この薄暗い日々に、愛と、少しのメロディを。
album: ディジタル・マジカル
album: ワンダードッグパレード
album: ころしちゃった! (zensen Remix)
album: バブルの素敵なフルコース
album: アタシ・ア・ラ・モ～ド
album: はっぴーげーむ
album: 脳内傑作選
album: ミッドナイト・ローズ

Acousticness
type: PropertyValue
value: 0.01

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.276

Valence (Positivity)
type: PropertyValue
value: 0.759

Loudness (dB)
type: PropertyValue
value: -3.887

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major

Ms. Clown Snowwhite
type: MusicAlbum
date published: 2022-03-18

ミスクラウン・スノーホワイト
type: MusicAlbum
date published: 2022-03-18

エンドレス・スヌーズ
type: MusicAlbum
date published: 2022-06-01

東京ナイトホーク
type: MusicAlbum
date published: 2022-06-01

染み付いて幸福
type: MusicAlbum
date published: 2022-11-16

アリスのマジカルハッピーワールド
type: MusicAlbum
date published: 2022-11-16

ウィングレス・エンゼル
type: MusicAlbum
date published: 2022-11-16

メリー・アンバースデー
type: MusicAlbum
date published: 2023-02-13

さよなら、ネバーランド
type: MusicAlbum
date published: 2023-03-01

トップ・ノッチ・スノッブ
type: MusicAlbum
date published: 2023-07-12
track: トップ・ノッチ・スノッブ
  type: MusicRecording
  duration: PT2M6S
  duration ms: 126315
  explicit: false
  by artist: 夏山よつぎ
  in album: トップ・ノッチ・スノッブ
    type: MusicAlbum
    date published: 2023-07-12
  genre: vocaloid
  isrc code: JPX562300603
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-29T09:07:25+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfe1ba5022627f013dadd7ea1ccd6db363eb1d36f2600dece351a03f3b35943a8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956545
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956545
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX562300603
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T19:59:51Z
  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 0xfe1ba5022627f013dadd7ea1ccd6db363eb1d36f2600dece351a03f3b35943a8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPX562300603.
    date published: 2026-07-03T19:59:51Z
  audio: トップ・ノッチ・スノッブ
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 94.881
    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: 0.479
    additional property: Energy
      type: PropertyValue
      value: 0.981
    additional property: Speechiness
      type: PropertyValue
      value: 0.246
    additional property: Acousticness
      type: PropertyValue
      value: 0.002
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.459
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.676
    additional property: Loudness (dB)
      type: PropertyValue
      value: -1.172
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Major

ラスト・ラヴソング
type: MusicAlbum
date published: 2023-10-20

わちゃちゃむ!
type: MusicAlbum
date published: 2023-10-20
track: わちゃちゃむ! (feat. りむる)
  type: MusicRecording
  duration: PT2M7S
  duration ms: 127058
  explicit: false
  by artist: 夏山よつぎ
  in album: わちゃちゃむ!
    type: MusicAlbum
    date published: 2023-10-20
  genre: vocaloid
  isrc code: JP92Q2301957
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T04:30:23+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xaac9aa7265b369f5cc1d66edef288c146aa51c622df9b61782247a4df2e2f8d0
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958242
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958242
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2301957
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T07:33:12Z
  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 0xaac9aa7265b369f5cc1d66edef288c146aa51c622df9b61782247a4df2e2f8d0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:33:12Z), 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/JP92Q2301957.
    date published: 2026-07-16T07:33:12Z
  audio: わちゃちゃむ! (feat. りむる)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 170.032
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.539
    additional property: Energy
      type: PropertyValue
      value: 0.978
    additional property: Speechiness
      type: PropertyValue
      value: 0.171
    additional property: Acousticness
      type: PropertyValue
      value: 0.101
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.392
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.916
    additional property: Loudness (dB)
      type: PropertyValue
      value: -0.76
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major

感情は旋律のなかに
type: MusicAlbum
date published: 2024-03-06
track: 東京ナイトホーク
  type: MusicRecording
  duration: PT3M55S
  duration ms: 235833
  explicit: false
  by artist: 夏山よつぎ
  in album: 感情は旋律のなかに
    type: MusicAlbum
    date published: 2024-03-06
  genre: vocaloid
  isrc code: JPX562200432
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x5254752e5d0864515394a2add7efd893ab76591bc630c36d81655c1498f9d739
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958761
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958761
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX562200432
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T20:26:39Z
  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 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 0x5254752e5d0864515394a2add7efd893ab76591bc630c36d81655c1498f9d739. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:39Z), 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/JPX562200432.
    date published: 2026-07-19T20:26:39Z
  audio: 東京ナイトホーク
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 144.056
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.493
    additional property: Energy
      type: PropertyValue
      value: 0.939
    additional property: Speechiness
      type: PropertyValue
      value: 0.102
    additional property: Acousticness
      type: PropertyValue
      value: 0.001
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.258
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.546
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.216
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: トップ・ノッチ・スノッブ
  type: MusicRecording
  duration: PT2M6S
  duration ms: 126315
  explicit: false
  by artist: 夏山よつぎ
  in album: 感情は旋律のなかに
    type: MusicAlbum
    date published: 2024-03-06
  genre: vocaloid
  isrc code: JPX562300603
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-29T09:07:25+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfe1ba5022627f013dadd7ea1ccd6db363eb1d36f2600dece351a03f3b35943a8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956545
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956545
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX562300603
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T19:59:51Z
  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 0xfe1ba5022627f013dadd7ea1ccd6db363eb1d36f2600dece351a03f3b35943a8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPX562300603.
    date published: 2026-07-03T19:59:51Z
  audio: トップ・ノッチ・スノッブ
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 95.018
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.537
    additional property: Energy
      type: PropertyValue
      value: 0.964
    additional property: Speechiness
      type: PropertyValue
      value: 0.08
    additional property: Acousticness
      type: PropertyValue
      value: 0.001
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.363
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.865
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.27
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Emotions in the melody
type: MusicAlbum
date published: 2024-03-06
track: Tokyo Nighthawk
  type: MusicRecording
  duration: PT3M55S
  duration ms: 235833
  explicit: false
  by artist: 夏山よつぎ
  in album: Emotions in the melody
    type: MusicAlbum
    date published: 2024-03-06
  genre: vocaloid
  isrc code: JPX562200432
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T09:35:37+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x5254752e5d0864515394a2add7efd893ab76591bc630c36d81655c1498f9d739
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958714
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958714
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX562200432
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T09:51:44Z
  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 0x5254752e5d0864515394a2add7efd893ab76591bc630c36d81655c1498f9d739. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/JPX562200432.
    date published: 2026-07-19T09:51:44Z
  audio: Tokyo Nighthawk
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 144.056
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.493
    additional property: Energy
      type: PropertyValue
      value: 0.939
    additional property: Speechiness
      type: PropertyValue
      value: 0.102
    additional property: Acousticness
      type: PropertyValue
      value: 0.001
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.258
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.546
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.216
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Top Notch Snob
  type: MusicRecording
  duration: PT2M6S
  duration ms: 126315
  explicit: false
  by artist: 夏山よつぎ
  in album: Emotions in the melody
    type: MusicAlbum
    date published: 2024-03-06
  genre: vocaloid
  isrc code: JPX562300603
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-29T09:07:25+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfe1ba5022627f013dadd7ea1ccd6db363eb1d36f2600dece351a03f3b35943a8
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956375
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956375
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPX562300603
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T16:51:38Z
  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 0xfe1ba5022627f013dadd7ea1ccd6db363eb1d36f2600dece351a03f3b35943a8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPX562300603.
    date published: 2026-07-02T16:51:38Z
  audio: Top Notch Snob
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 95.018
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.537
    additional property: Energy
      type: PropertyValue
      value: 0.964
    additional property: Speechiness
      type: PropertyValue
      value: 0.08
    additional property: Acousticness
      type: PropertyValue
      value: 0.001
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.363
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.865
    additional property: Loudness (dB)
      type: PropertyValue
      value: -3.27
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor

ころしちゃった!
type: MusicAlbum
date published: 2024-03-15

Winter: No.19
type: MusicAlbum
date published: 2024-05-02
track: Winter: No.19 (feat. 初音ミク)
  type: MusicRecording
  duration: PT2M10S
  duration ms: 130000
  explicit: false
  by artist: 夏山よつぎ
  in album: Winter: No.19
    type: MusicAlbum
    date published: 2024-05-02
  genre: vocaloid
  isrc code: JP92Q2400459
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-19T06:50:47+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe48b3bd76392d31d8a9e7c775c8b9f5be1b2f0a171eb3c910836693baafb7cf3
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958691
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958691
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2400459
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-19T07:19:31Z
  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 0xe48b3bd76392d31d8a9e7c775c8b9f5be1b2f0a171eb3c910836693baafb7cf3. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/JP92Q2400459.
    date published: 2026-07-19T07:19:31Z
  audio: Winter: No.19 (feat. 初音ミク)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 72.12
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.495
    additional property: Energy
      type: PropertyValue
      value: 0.926
    additional property: Speechiness
      type: PropertyValue
      value: 0.226
    additional property: Acousticness
      type: PropertyValue
      value: 0.12
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.311
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.658
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.398
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Minor

グッバイ、カタルシスター
type: MusicAlbum
date published: 2024-08-21

ヴィラン・ラ・ラヴィン
type: MusicAlbum
date published: 2024-10-02

この薄暗い日々に、愛と、少しのメロディを。
type: MusicAlbum
date published: 2025-01-08

ディジタル・マジカル
type: MusicAlbum
date published: 2025-02-12

ワンダードッグパレード
type: MusicAlbum
date published: 2025-05-08

ころしちゃった! (zensen Remix)
type: MusicAlbum
date published: 2025-09-04
track: ころしちゃった! - zensen Remix
  type: MusicRecording
  duration: PT3M30S
  duration ms: 210909
  explicit: false
  by artist: 夏山よつぎ
  in album: ころしちゃった! (zensen Remix)
    type: MusicAlbum
    date published: 2025-09-04
  genre: vocaloid
  isrc code: QT66J2527457
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-04T21:31:55+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x7216aed6aa71a352ca6180f8fdbe25c699448c0e74db11b73ae56d588ff18165
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956725
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956725
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT66J2527457
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T01:12:41Z
  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 0x7216aed6aa71a352ca6180f8fdbe25c699448c0e74db11b73ae56d588ff18165. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT66J2527457.
    date published: 2026-07-05T01:12:41Z
  audio: ころしちゃった! - zensen Remix
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 132.017
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.801
    additional property: Energy
      type: PropertyValue
      value: 0.994
    additional property: Speechiness
      type: PropertyValue
      value: 0.158
    additional property: Acousticness
      type: PropertyValue
      value: 0.265
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.295
    additional property: Liveness
      type: PropertyValue
      value: 0.107
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.769
    additional property: Loudness (dB)
      type: PropertyValue
      value: -2.391
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Major

バブルの素敵なフルコース
type: MusicAlbum
date published: 2025-09-05
track: バブルの素敵なフルコース (feat. 初音ミク&ずんだもん)
  type: MusicRecording
  duration: PT2M9S
  duration ms: 129041
  explicit: false
  by artist: 夏山よつぎ
  in album: バブルの素敵なフルコース
    type: MusicAlbum
    date published: 2025-09-05
  genre: vocaloid
  isrc code: JP92Q2502790
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-02T22:09:56+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x26c61d4543fc256dfe49c1dd84468fc68c96a0b15dbc915aa6635688624ac626
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956420
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956420
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2502790
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-03T00:42:11Z
  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 0x26c61d4543fc256dfe49c1dd84468fc68c96a0b15dbc915aa6635688624ac626. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JP92Q2502790.
    date published: 2026-07-03T00:42:11Z
  audio: バブルの素敵なフルコース (feat. 初音ミク&ずんだもん)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 146.038
    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: 0.812
    additional property: Energy
      type: PropertyValue
      value: 0.882
    additional property: Speechiness
      type: PropertyValue
      value: 0.221
    additional property: Acousticness
      type: PropertyValue
      value: 0.047
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.001
    additional property: Liveness
      type: PropertyValue
      value: 0.032
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.386
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.417
    additional property: Key Name
      type: PropertyValue
      value: Ab
    additional property: Mode Name
      type: PropertyValue
      value: Major

アタシ・ア・ラ・モ～ド
type: MusicAlbum
date published: 2025-09-05
track: アタシ・ア・ラ・モ～ド (feat. 鏡音リン&初音ミク)
  type: MusicRecording
  duration: PT3M9S
  duration ms: 189565
  explicit: false
  by artist: 夏山よつぎ
  in album: アタシ・ア・ラ・モ～ド
    type: MusicAlbum
    date published: 2025-09-05
  genre: vocaloid
  isrc code: JP92Q2502789
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T18:43:02+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x8826e583e5c6a8a85a647ad459a53119639ad5899ca38a07b3eec1fdc0e626ed
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958194
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958194
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JP92Q2502789
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T20:32:27Z
  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 0x8826e583e5c6a8a85a647ad459a53119639ad5899ca38a07b3eec1fdc0e626ed. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JP92Q2502789.
    date published: 2026-07-15T20:32:27Z
  audio: アタシ・ア・ラ・モ～ド (feat. 鏡音リン&初音ミク)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 137.974
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.736
    additional property: Energy
      type: PropertyValue
      value: 0.928
    additional property: Speechiness
      type: PropertyValue
      value: 0.247
    additional property: Acousticness
      type: PropertyValue
      value: 0.028
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.412
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.627
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.565
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor

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type: MusicAlbum
date published: 2025-09-05

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type: MusicAlbum
date published: 2025-09-10

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type: MusicAlbum
date published: 2025-10-10