Karl Lieffen
type: MusicGroup
description: Karl Lieffen (17 May 1926 – 13 January 1999), born Karel František Lifka, was a German film actor. He appeared in more than 140 films on screen and television between 1949 and 1998. Biography He was
popularity: 10
followers: 9
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4d4a1cabdbc1cfd563efa82f71bca4fbb4d364014aa4f202b5423edcf3e41474
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a47a187-6583-47cb-a658-2d360f2e06dc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5a47a187-6583-47cb-a658-2d360f2e06dc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5a47a187-6583-47cb-a658-2d360f2e06dc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4d4a1cabdbc1cfd563efa82f71bca4fbb4d364014aa4f202b5423edcf3e41474","name":"Karl Lieffen","registered_at":"2026-06-16T21:10:27Z","symbol":"NIM1176624","token_address":"0x365b7c1bcae1d0e719cc0fa74c6a524ef4648a93","type":"artist","uuid":"5a47a187-6583-47cb-a658-2d360f2e06dc"}
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 0x4d4a1cabdbc1cfd563efa82f71bca4fbb4d364014aa4f202b5423edcf3e41474. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a47a187-6583-47cb-a658-2d360f2e06dc.json and https://artists.proofprofile.net/proofs/artist/5a47a187-6583-47cb-a658-2d360f2e06dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x4d4a1cabdbc1cfd563efa82f71bca4fbb4d364014aa4f202b5423edcf3e41474","name":"Karl Lieffen","registered_at":"2026-06-16T21:10:27Z","symbol":"NIM1176624","token_address":"0x365b7c1bcae1d0e719cc0fa74c6a524ef4648a93","type":"artist","uuid":"5a47a187-6583-47cb-a658-2d360f2e06dc"}