Calibre 57
type: MusicGroup
genre: ska
genre: ska punk
popularity: 2
followers: 952
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x23793215f1b9d8923efdf50d371d7d43e7cd9e264f175cefcfd8eb625781c3c3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954032
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954032
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3bdf34bb-a6e2-456d-a04e-02445de1b380.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3bdf34bb-a6e2-456d-a04e-02445de1b380.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3bdf34bb-a6e2-456d-a04e-02445de1b380
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T01:59:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x23793215f1b9d8923efdf50d371d7d43e7cd9e264f175cefcfd8eb625781c3c3","name":"Calibre 57","registered_at":"2026-06-16T10:23:39Z","symbol":"NIM1022309","token_address":"0xc5d3e8f8627273851ce912a88bf78ddc26640372","type":"artist","uuid":"3bdf34bb-a6e2-456d-a04e-02445de1b380"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23793215f1b9d8923efdf50d371d7d43e7cd9e264f175cefcfd8eb625781c3c3. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bdf34bb-a6e2-456d-a04e-02445de1b380.json and https://artists.proofprofile.net/proofs/artist/3bdf34bb-a6e2-456d-a04e-02445de1b380.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T01:59:41Z
  text: {"copyright_id":"0x23793215f1b9d8923efdf50d371d7d43e7cd9e264f175cefcfd8eb625781c3c3","name":"Calibre 57","registered_at":"2026-06-16T10:23:39Z","symbol":"NIM1022309","token_address":"0xc5d3e8f8627273851ce912a88bf78ddc26640372","type":"artist","uuid":"3bdf34bb-a6e2-456d-a04e-02445de1b380"}
album: Paradoja City
  type: MusicAlbum
  date published: 2018-09-17
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  type: MusicAlbum
  date published: 2020-01-13
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  date published: 2020-05-01
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  date published: 2021-09-09
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  type: MusicAlbum
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