Roma Ligocka
type: MusicGroup
description: Roma Ligocka (born Roma Liebling, 13 November 1938) is a Polish writer, and painter. She was born in a Jewish family in Kraków a year before World War II. During the German occupation of Poland, her
popularity: 5
followers: 17
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x750550f5d5659b3eceb71bc2f20f26bc3c4a008a442a9e7c74376774c47bfa45
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954689
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954689
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e285025f-9bc7-4308-ad33-179d8889625e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e285025f-9bc7-4308-ad33-179d8889625e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e285025f-9bc7-4308-ad33-179d8889625e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T10:35:31Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x750550f5d5659b3eceb71bc2f20f26bc3c4a008a442a9e7c74376774c47bfa45","name":"Roma Ligocka","registered_at":"2026-06-21T07:09:47Z","symbol":"NIM1858451","token_address":"0x86ec86d5019e02d386e6743cc8e5403ae146eea1","type":"artist","uuid":"e285025f-9bc7-4308-ad33-179d8889625e"}
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 0x750550f5d5659b3eceb71bc2f20f26bc3c4a008a442a9e7c74376774c47bfa45. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e285025f-9bc7-4308-ad33-179d8889625e.json and https://artists.proofprofile.net/proofs/artist/e285025f-9bc7-4308-ad33-179d8889625e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T10:35:31Z
  text: {"copyright_id":"0x750550f5d5659b3eceb71bc2f20f26bc3c4a008a442a9e7c74376774c47bfa45","name":"Roma Ligocka","registered_at":"2026-06-21T07:09:47Z","symbol":"NIM1858451","token_address":"0x86ec86d5019e02d386e6743cc8e5403ae146eea1","type":"artist","uuid":"e285025f-9bc7-4308-ad33-179d8889625e"}
album: Das Mädchen im roten Mantel
  type: MusicAlbum
  date published: 2006