Sayaka Ito
type: MusicGroup
genre: city pop
genre: kayokyoku
popularity: 14
followers: 1210
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xfa65ac4c93a49101a8707caec69445fa5e4e29be2307e7700474f930c2c8dc53
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953660
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953660
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/52e71a14-42d9-49fa-9fa8-9fb7f841a9b7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/52e71a14-42d9-49fa-9fa8-9fb7f841a9b7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/52e71a14-42d9-49fa-9fa8-9fb7f841a9b7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T17:20:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfa65ac4c93a49101a8707caec69445fa5e4e29be2307e7700474f930c2c8dc53","name":"Sayaka Ito","registered_at":"2026-06-14T13:13:15Z","symbol":"NIM0463704","token_address":"0x6d91253dbcf7fb6499775ec9d2c64cbe3370e8ad","type":"artist","uuid":"52e71a14-42d9-49fa-9fa8-9fb7f841a9b7"}
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 0xfa65ac4c93a49101a8707caec69445fa5e4e29be2307e7700474f930c2c8dc53. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52e71a14-42d9-49fa-9fa8-9fb7f841a9b7.json and https://artists.proofprofile.net/proofs/artist/52e71a14-42d9-49fa-9fa8-9fb7f841a9b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T17:20:01Z
  text: {"copyright_id":"0xfa65ac4c93a49101a8707caec69445fa5e4e29be2307e7700474f930c2c8dc53","name":"Sayaka Ito","registered_at":"2026-06-14T13:13:15Z","symbol":"NIM0463704","token_address":"0x6d91253dbcf7fb6499775ec9d2c64cbe3370e8ad","type":"artist","uuid":"52e71a14-42d9-49fa-9fa8-9fb7f841a9b7"}
album: ナ・ン・パ…して! ニュートラルSAYAKA
  type: MusicAlbum
  date published: 1982
album: Anata to OVER-HEAT Shitai
  type: MusicAlbum
  date published: 1982
album: Tenshi to Akuma (Nanpa Saretai Hen)
  type: MusicAlbum
  date published: 1982
album: アナタトOVER-HEATシタイ
  type: MusicAlbum
  date published: 1982
album: Nanpa...shite! Neutral SAYAKA
  type: MusicAlbum
  date published: 1982
album: 天使と悪魔（ナンパされたい編）
  type: MusicAlbum
  date published: 1982
album: Yoroshiku Saretai! Accel on SAYAKA
  type: MusicAlbum
  date published: 1982
album: ヨロシク・されたい! アクセル・オンSAYAKA
  type: MusicAlbum
  date published: 1982
album: Nostalgic SAYAKA
  type: MusicAlbum
  date published: 1983
album: ブロークン・ジェネレイション
  type: MusicAlbum
  date published: 1983
album: Riyu Naki Hanko
  type: MusicAlbum
  date published: 1983
album: ブロークン・ジェネレイション ～フル・スロットルSAYAKA
  type: MusicAlbum
  date published: 1983
album: Koi wa Feel So Light De!
  type: MusicAlbum
  date published: 1983
album: Broken Generation
  type: MusicAlbum
  date published: 1983
album: Suteki ni Jingle Bells ('Cause It's Christmas)
  type: MusicAlbum
  date published: 1983
album: 素敵にジングルベル（'Cause It's Christmas）
  type: MusicAlbum
  date published: 1983
album: Broken Generation -Full Throttle SAYAKA
  type: MusicAlbum
  date published: 1983
album: ノスタルジック SAYAKA
  type: MusicAlbum
  date published: 1983
album: POSITIVE SMILE -SAYAKA IV-
  type: MusicAlbum
  date published: 1983
album: POSITIVE SMILE -SAYAKA 4-
  type: MusicAlbum
  date published: 1983
album: 恋はFeel So Lightで！
  type: MusicAlbum
  date published: 1983
album: 理由なき反抗
  type: MusicAlbum
  date published: 1983
album: 気分はグレイテスト・ヒッツ! SAYAKA Early Best
  type: MusicAlbum
  date published: 1984
  track: 天使と悪魔（ナンパされたい編）
    type: MusicRecording
    duration: PT3M46S
    duration ms: 226605
    explicit: false
    by artist: Sayaka Ito
    in album: 気分はグレイテスト・ヒッツ! SAYAKA Early Best
      type: MusicAlbum
      date published: 1984
    genre: city pop
    genre: kayokyoku
    isrc code: JPVI08200090
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T21:56:29+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3c18e403ce6300851735bd30b95a824ef36bbca29f69426c16cc2efdab83b589
    additional property: OTSHash
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      type: PropertyValue
      value: 958335
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958335
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI08200090
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T00:58:06Z
    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 0x3c18e403ce6300851735bd30b95a824ef36bbca29f69426c16cc2efdab83b589. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:06Z), 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/JPVI08200090.
      date published: 2026-07-17T00:58:06Z
    audio: 天使と悪魔（ナンパされたい編）
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 168.205
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.692
      additional property: Energy
        type: PropertyValue
        value: 0.723
      additional property: Speechiness
        type: PropertyValue
        value: 0.078
      additional property: Acousticness
        type: PropertyValue
        value: 0.08
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.381
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.747
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.538
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: 伊藤 さやかコレクション
  type: MusicAlbum
  date published: 2012-11-21
album: Kibun wa Greatest Hits! SAYAKA Early Best
  type: MusicAlbum
  date published: 2023-07-12
album: 恋の呪文はスキトキメキトキス
album: Koi no Jumon wa Sukitokimekitokisu
album: 伊藤さやかコレクション
album: Sayaka Ito Collection

恋の呪文はスキトキメキトキス
type: MusicAlbum
date published: 2023-07-12
track: 恋のB級アクション
  type: MusicRecording
  duration: PT2M53S
  duration ms: 173666
  explicit: false
  by artist: Sayaka Ito
  in album: 恋の呪文はスキトキメキトキス
    type: MusicAlbum
    date published: 2023-07-12
  genre: city pop
  genre: kayokyoku
  isrc code: JPVI08206310
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T08:22:41+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xa15ba0209313c6e6190fc19d27dec8d83a7ee2fd1dd00597ea6d098c717f532e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958388
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958388
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI08206310
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-17T09:14:21Z
  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 0xa15ba0209313c6e6190fc19d27dec8d83a7ee2fd1dd00597ea6d098c717f532e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/JPVI08206310.
    date published: 2026-07-17T09:14:21Z
  audio: 恋のB級アクション
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 152.033
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.842
    additional property: Energy
      type: PropertyValue
      value: 0.837
    additional property: Speechiness
      type: PropertyValue
      value: 0.05
    additional property: Acousticness
      type: PropertyValue
      value: 0.248
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.094
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.952
    additional property: Loudness (dB)
      type: PropertyValue
      value: -5.336
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major

Koi no Jumon wa Sukitokimekitokisu
type: MusicAlbum
date published: 2023-07-12

伊藤さやかコレクション
type: MusicAlbum
date published: 2023-12-20

Sayaka Ito Collection
type: MusicAlbum
date published: 2023-12-20