夜想令嬢 -GRAC&E NOCTURNE-
type: MusicGroup
popularity: 7
followers: 33
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4543c812d51b2b58799e552dcc5cf791c8a992973c2c3bef799e5e43339922a5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/60e1afa4-e076-46c8-9ea1-8b3d11f5b601.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/60e1afa4-e076-46c8-9ea1-8b3d11f5b601.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/60e1afa4-e076-46c8-9ea1-8b3d11f5b601
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4543c812d51b2b58799e552dcc5cf791c8a992973c2c3bef799e5e43339922a5","name":"夜想令嬢 -GRAC&E NOCTURNE-","registered_at":"2026-06-16T23:25:54Z","symbol":"NIM1208925","token_address":"0xeb4507838b9cc4af0975704c082d3fab5f9ed657","type":"artist","uuid":"60e1afa4-e076-46c8-9ea1-8b3d11f5b601"}
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 0x4543c812d51b2b58799e552dcc5cf791c8a992973c2c3bef799e5e43339922a5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60e1afa4-e076-46c8-9ea1-8b3d11f5b601.json and https://artists.proofprofile.net/proofs/artist/60e1afa4-e076-46c8-9ea1-8b3d11f5b601.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x4543c812d51b2b58799e552dcc5cf791c8a992973c2c3bef799e5e43339922a5","name":"夜想令嬢 -GRAC&E NOCTURNE-","registered_at":"2026-06-16T23:25:54Z","symbol":"NIM1208925","token_address":"0xeb4507838b9cc4af0975704c082d3fab5f9ed657","type":"artist","uuid":"60e1afa4-e076-46c8-9ea1-8b3d11f5b601"}
album: THE IDOLM@STER MILLION THE@TER GENERATION 05 夜想令嬢 -GRAC&E NOCTURNE-
  type: MusicAlbum
  date published: 2018-02-28
  track: 昏き星、遠い月
    type: MusicRecording
    duration: PT4M10S
    duration ms: 250120
    explicit: false
    by artist: 夜想令嬢 -GRAC&E NOCTURNE-
    in album: THE IDOLM@STER MILLION THE@TER GENERATION 05 夜想令嬢 -GRAC&E NOCTURNE-
      type: MusicAlbum
      date published: 2018-02-28
    isrc code: JPI101800050
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T21:24:21+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5f79012d3d0e0b3853af37b1694621a8e42303e3e9d8b0071e7e5c118aeb54ee
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958212
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958212
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPI101800050
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T00:30:51Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f79012d3d0e0b3853af37b1694621a8e42303e3e9d8b0071e7e5c118aeb54ee. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:30:51Z), 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/JPI101800050.
      date published: 2026-07-16T00:30:51Z
    audio: 昏き星、遠い月
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 163.912
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.53
      additional property: Energy
        type: PropertyValue
        value: 0.698
      additional property: Speechiness
        type: PropertyValue
        value: 0.084
      additional property: Acousticness
        type: PropertyValue
        value: 0.459
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.218
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.53
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.017
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
  track: Everlasting
    type: MusicRecording
    duration: PT5M2S
    duration ms: 302413
    explicit: false
    by artist: 夜想令嬢 -GRAC&E NOCTURNE-
    in album: THE IDOLM@STER MILLION THE@TER GENERATION 05 夜想令嬢 -GRAC&E NOCTURNE-
      type: MusicAlbum
      date published: 2018-02-28
    isrc code: JPI101800053
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T01:17:33+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8cd25f4596c2dc2f66a987c0a591a9d4c7eb7c253d11379e62c893a4fee202e2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956639
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956639
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPI101800053
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T11:19:20Z
    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 0x8cd25f4596c2dc2f66a987c0a591a9d4c7eb7c253d11379e62c893a4fee202e2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPI101800053.
      date published: 2026-07-04T11:19:20Z
    audio: Everlasting
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 133.948
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.468
      additional property: Energy
        type: PropertyValue
        value: 0.184
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.864
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.103
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.255
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.238
      additional property: Key Name
      additional property: Mode Name

Key Name
type: PropertyValue
value: A

Mode Name
type: PropertyValue
value: Major