せみしぐれ
type: MusicGroup
popularity: 2
followers: 66
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x35e53eb920603d1b89046547fc7c2f9db6f9db7bf124e042fd280a66b133cacb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e700edda-4814-4cea-a051-5e47515a8e22.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e700edda-4814-4cea-a051-5e47515a8e22.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e700edda-4814-4cea-a051-5e47515a8e22
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x35e53eb920603d1b89046547fc7c2f9db6f9db7bf124e042fd280a66b133cacb","name":"せみしぐれ","registered_at":"2026-06-21T08:50:25Z","symbol":"NIM1880422","token_address":"0x42edbbfdbbc5b81117b2bb5310a318ef15f8477b","type":"artist","uuid":"e700edda-4814-4cea-a051-5e47515a8e22"}
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 0x35e53eb920603d1b89046547fc7c2f9db6f9db7bf124e042fd280a66b133cacb. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e700edda-4814-4cea-a051-5e47515a8e22.json and https://artists.proofprofile.net/proofs/artist/e700edda-4814-4cea-a051-5e47515a8e22.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x35e53eb920603d1b89046547fc7c2f9db6f9db7bf124e042fd280a66b133cacb","name":"せみしぐれ","registered_at":"2026-06-21T08:50:25Z","symbol":"NIM1880422","token_address":"0x42edbbfdbbc5b81117b2bb5310a318ef15f8477b","type":"artist","uuid":"e700edda-4814-4cea-a051-5e47515a8e22"}
album: 夏祭り (Cover)
  type: MusicAlbum
  date published: 2023-08-01
  track: 夏祭り - Cover
    type: MusicRecording
    duration: PT3M54S
    duration ms: 234893
    explicit: false
    by artist: せみしぐれ
    in album: 夏祭り (Cover)
      type: MusicAlbum
      date published: 2023-08-01
    isrc code: TCJPW2362042
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T00:04:17+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x0dca696e56bd800bf68b376b5c2dac8ca5c9a7eca628deb7e7e0da53327a7f82
    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/TCJPW2362042
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T03:04:50Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dca696e56bd800bf68b376b5c2dac8ca5c9a7eca628deb7e7e0da53327a7f82. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:50Z), 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/TCJPW2362042.
      date published: 2026-07-20T03:04:50Z
    audio: 夏祭り - Cover
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 140.943
      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: 0.543
      additional property: Energy
        type: PropertyValue
        value: 0.913
      additional property: Speechiness
        type: PropertyValue
        value: 0.092
      additional property: Acousticness
        type: PropertyValue
        value: 0.004
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.041
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.421
      additional property: Loudness (dB)
        type: PropertyValue
        value: -4.772
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major