ぺんぎんの憂鬱
type: MusicGroup
genre: japanese indie
genre: melodic hardcore
genre: shoegaze
popularity: 5
followers: 1513
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xff10746bfc30a7346648710ad18b8f225be5b347b0a882d48d74e6fb044d24cc
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/ca2c7b8d-f8fd-4d4c-a0f4-d3d9ab8463b3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ca2c7b8d-f8fd-4d4c-a0f4-d3d9ab8463b3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ca2c7b8d-f8fd-4d4c-a0f4-d3d9ab8463b3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xff10746bfc30a7346648710ad18b8f225be5b347b0a882d48d74e6fb044d24cc","name":"ぺんぎんの憂鬱","registered_at":"2026-06-20T22:31:58Z","symbol":"NIM1735117","token_address":"0xf6bb1a8124b878c311ee35c3c37654a9aa2411cf","type":"artist","uuid":"ca2c7b8d-f8fd-4d4c-a0f4-d3d9ab8463b3"}
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 0xff10746bfc30a7346648710ad18b8f225be5b347b0a882d48d74e6fb044d24cc. 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/ca2c7b8d-f8fd-4d4c-a0f4-d3d9ab8463b3.json and https://artists.proofprofile.net/proofs/artist/ca2c7b8d-f8fd-4d4c-a0f4-d3d9ab8463b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xff10746bfc30a7346648710ad18b8f225be5b347b0a882d48d74e6fb044d24cc","name":"ぺんぎんの憂鬱","registered_at":"2026-06-20T22:31:58Z","symbol":"NIM1735117","token_address":"0xf6bb1a8124b878c311ee35c3c37654a9aa2411cf","type":"artist","uuid":"ca2c7b8d-f8fd-4d4c-a0f4-d3d9ab8463b3"}
album: ペンギン・シンドローム/塩
  type: MusicAlbum
  date published: 2021-03-15
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  type: MusicAlbum
  date published: 2022-02-09
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  type: MusicAlbum
  date published: 2022-02-11
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  type: MusicAlbum
  date published: 2022-06-02
album: 延滞
  type: MusicAlbum
  date published: 2023-05-24
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  type: MusicAlbum
  date published: 2023-06-21