麻帆良学園中等部2-A(椎名桜子、龍宮真名、超鈴音、長瀬楓、那波千鶴)
type: MusicGroup
popularity: 2
followers: 15
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/9a0367aa-5720-461d-a141-0289496657f8.ots
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  value: https://artists.proofprofile.net/proofs/artist/9a0367aa-5720-461d-a141-0289496657f8.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x24c13d5ab113dbda9f85e697115702a82781476863c45e64a1f72f547c3c48e0","name":"麻帆良学園中等部2-A(椎名桜子、龍宮真名、超鈴音、長瀬楓、那波千鶴)","registered_at":"2026-06-17T19:25:55Z","symbol":"NIM1495150","token_address":"0x1652ff8a3f67ffe4d0d244e7f4e3174cc44278c7","type":"artist","uuid":"9a0367aa-5720-461d-a141-0289496657f8"}
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c13d5ab113dbda9f85e697115702a82781476863c45e64a1f72f547c3c48e0. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a0367aa-5720-461d-a141-0289496657f8.json and https://artists.proofprofile.net/proofs/artist/9a0367aa-5720-461d-a141-0289496657f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x24c13d5ab113dbda9f85e697115702a82781476863c45e64a1f72f547c3c48e0","name":"麻帆良学園中等部2-A(椎名桜子、龍宮真名、超鈴音、長瀬楓、那波千鶴)","registered_at":"2026-06-17T19:25:55Z","symbol":"NIM1495150","token_address":"0x1652ff8a3f67ffe4d0d244e7f4e3174cc44278c7","type":"artist","uuid":"9a0367aa-5720-461d-a141-0289496657f8"}
album: ハッピー☆マテリアル
  type: MusicAlbum
  date published: 2005-05-11
  track: ハッピー☆マテリアル
    type: MusicRecording
    duration: PT3M45S
    duration ms: 225493
    explicit: false
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    in album: ハッピー☆マテリアル
      type: MusicAlbum
      date published: 2005-05-11
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    additional property: CopyrightStatus
      type: PropertyValue
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958798
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKI00502796
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T02:08:51Z
    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 0xf4157e2e238a6af33ddb5c0c5820c467025397bb991b55f2fd846394b0add199. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:51Z), 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/JPKI00502796.
      date published: 2026-07-20T02:08:51Z
    audio: ハッピー☆マテリアル
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      additional property: Tempo (BPM)
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      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
        type: PropertyValue
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      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
        type: PropertyValue
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      additional property: Acousticness
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      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.963
      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.211
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major