長靴をはいた猫
type: MusicGroup
genre: japanese indie
genre: j-rock
popularity: 18
followers: 3093
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additional property: CopyrightChainExplorerURL
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4282947be504046176f03400459909fbabdd19f12b0ceb34e3e10540708291bb. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51457d60-1a2e-4c79-be2a-932c3d8043a0.json and https://artists.proofprofile.net/proofs/artist/51457d60-1a2e-4c79-be2a-932c3d8043a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:49:28Z
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album: 藍微塵の花言葉
  type: MusicAlbum
  date published: 2017-10-06
album: 仄明かりに溺れる
  type: MusicAlbum
  date published: 2018-06-16
album: 慟哭する夜の底で
  type: MusicAlbum
  date published: 2019-12-11
  track: 序章
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    by artist: 長靴をはいた猫
    in album: 慟哭する夜の底で
      type: MusicAlbum
      date published: 2019-12-11
    genre: japanese indie
    genre: j-rock
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    additional property: OTSTimestamp
      type: PropertyValue
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    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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf54ce959d041e028573bc6112b8d686fc1af9fe298b4564c0d4e69d0e981f54. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/JPV751901590.
      date published: 2026-07-17T03:33:42Z
    audio: 序章
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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  track: 踊る水鞠
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    by artist: 長靴をはいた猫
    in album: 慟哭する夜の底で
      type: MusicAlbum
      date published: 2019-12-11
    genre: japanese indie
    genre: j-rock
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    additional property: OTSVerificationAPI
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    additional property: OTSTimestamp
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      value: 2026-07-03T21:18:05Z
    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
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      date published: 2026-07-03T21:18:05Z
    audio: 踊る水鞠
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      additional property: Danceability
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      additional property: Speechiness
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  track: 天満月

Instrumentalness
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Liveness
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Loudness (dB)
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天満月
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duration: PT4M50S
duration ms: 290987
explicit: false
by artist: 長靴をはいた猫
in album: 慟哭する夜の底で
  type: MusicAlbum
  date published: 2019-12-11
genre: japanese indie
genre: j-rock
isrc code: JPV751901595
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additional property: CopyrightStatus
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f13baea37b5b7c9a236b24f6f43d5258fadf1639435dba03e65cc639c78013. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPV751901595.
  date published: 2026-07-18T19:27:02Z
audio: 天満月
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