Midnight 90's
type: MusicGroup
genre: japanese indie
popularity: 4
followers: 1154
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5a7eb3c970b6893a97212061e1e06e4e64ca3b108e0bc10a400b098b9636e679
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b163a948-e004-43b6-baa0-78523f5a6c4a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b163a948-e004-43b6-baa0-78523f5a6c4a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b163a948-e004-43b6-baa0-78523f5a6c4a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5a7eb3c970b6893a97212061e1e06e4e64ca3b108e0bc10a400b098b9636e679","name":"Midnight 90's","registered_at":"2026-06-20T12:29:59Z","symbol":"NIM1612347","token_address":"0xdde2b762e27fb268c5567a4ce5fdd857175bfd3e","type":"artist","uuid":"b163a948-e004-43b6-baa0-78523f5a6c4a"}
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 0x5a7eb3c970b6893a97212061e1e06e4e64ca3b108e0bc10a400b098b9636e679. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b163a948-e004-43b6-baa0-78523f5a6c4a.json and https://artists.proofprofile.net/proofs/artist/b163a948-e004-43b6-baa0-78523f5a6c4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x5a7eb3c970b6893a97212061e1e06e4e64ca3b108e0bc10a400b098b9636e679","name":"Midnight 90's","registered_at":"2026-06-20T12:29:59Z","symbol":"NIM1612347","token_address":"0xdde2b762e27fb268c5567a4ce5fdd857175bfd3e","type":"artist","uuid":"b163a948-e004-43b6-baa0-78523f5a6c4a"}
album: ビギナーズラブソング
  type: MusicAlbum
  date published: 2021-05-15
  track: ビギナーズラブソング
    type: MusicRecording
    duration: PT4M4S
    duration ms: 244263
    explicit: false
    by artist: Midnight 90's
    in album: ビギナーズラブソング
      type: MusicAlbum
      date published: 2021-05-15
    genre: japanese indie
    isrc code: TCJPO2165567
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T05:29:17+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3ecaf7060dd3744a281f0841bf01d604382c46ddb21f12ad4bca54f28fcc6229
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956772
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956772
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPO2165567
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T10:01:46Z
    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 0x3ecaf7060dd3744a281f0841bf01d604382c46ddb21f12ad4bca54f28fcc6229. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPO2165567.
      date published: 2026-07-05T10:01:46Z
    audio: ビギナーズラブソング
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 98.534
      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: 0.491
      additional property: Energy
        type: PropertyValue
        value: 0.876
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.407
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.508
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.442
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Beginner's Love Song
  type: MusicAlbum
  date published: 2021-05-15
album: 出逢イハ宇宙船
  type: MusicAlbum
  date published: 2022-02-02
album: 昼下がり
  type: MusicAlbum
  date published: 2022-04-01
album: Hirusagari
  type: MusicAlbum
  date published: 2022-04-01
album: afternoon
  type: MusicAlbum
  date published: 2022-09-17
album: Otona Ni Natte
  type: MusicAlbum
  date published: 2022-12-17
album: 大人になって
  type: MusicAlbum
  date published: 2022-12-17
album: ずっと夢を見ていた
  type: MusicAlbum
  date published: 2023-06-01
album: Have a nice day!
  type: MusicAlbum
  date published: 2024-01-03
album: Have a nice day!
  type: MusicAlbum
  date published: 2024-01-03
album: 青い空は遠くの君から
  type: MusicAlbum
  date published: 2024-11-05
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  type: MusicAlbum
  date published: 2024-11-05