Rutka Laskier
type: MusicGroup
genre: emocore
genre: grindcore
genre: noise rock
genre: screamo
description: Ruth "Rutka" Laskier (12 June 1929 – December 1943) was a Jewish Polish diarist who is best known for her 1943 diary chronicling three months of her life during the Holocaust in Poland. She was murder
popularity: 5
followers: 1000
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x13b188a2bb351330bd848e157d7d1a9dd0bf51c83bca07d1184e61e569c323f0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f617c945-1ea3-49ee-b1ef-e71be6ae8fe8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f617c945-1ea3-49ee-b1ef-e71be6ae8fe8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f617c945-1ea3-49ee-b1ef-e71be6ae8fe8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x13b188a2bb351330bd848e157d7d1a9dd0bf51c83bca07d1184e61e569c323f0","name":"Rutka Laskier","registered_at":"2026-06-21T15:36:54Z","symbol":"NIM1962390","token_address":"0x7013946b7a72e408a0f6afec0856893a8b3176a3","type":"artist","uuid":"f617c945-1ea3-49ee-b1ef-e71be6ae8fe8"}
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 0x13b188a2bb351330bd848e157d7d1a9dd0bf51c83bca07d1184e61e569c323f0. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f617c945-1ea3-49ee-b1ef-e71be6ae8fe8.json and https://artists.proofprofile.net/proofs/artist/f617c945-1ea3-49ee-b1ef-e71be6ae8fe8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x13b188a2bb351330bd848e157d7d1a9dd0bf51c83bca07d1184e61e569c323f0","name":"Rutka Laskier","registered_at":"2026-06-21T15:36:54Z","symbol":"NIM1962390","token_address":"0x7013946b7a72e408a0f6afec0856893a8b3176a3","type":"artist","uuid":"f617c945-1ea3-49ee-b1ef-e71be6ae8fe8"}
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