Katarzyna Kurdej
type: MusicGroup
popularity: 6
followers: 4
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf216ee57aab5ce1b4d4f9ddd4985a9d17ff5908520257a3a91c91d601fccd3f6
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/c42b92a7-98ad-45ec-9ed2-c1dd2b438e7f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c42b92a7-98ad-45ec-9ed2-c1dd2b438e7f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c42b92a7-98ad-45ec-9ed2-c1dd2b438e7f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf216ee57aab5ce1b4d4f9ddd4985a9d17ff5908520257a3a91c91d601fccd3f6","name":"Katarzyna Kurdej","registered_at":"2026-06-20T20:50:16Z","symbol":"NIM1710451","token_address":"0x624e64ec08b686d4f1a08f542c24057af30cee04","type":"artist","uuid":"c42b92a7-98ad-45ec-9ed2-c1dd2b438e7f"}
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 0xf216ee57aab5ce1b4d4f9ddd4985a9d17ff5908520257a3a91c91d601fccd3f6. 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/c42b92a7-98ad-45ec-9ed2-c1dd2b438e7f.json and https://artists.proofprofile.net/proofs/artist/c42b92a7-98ad-45ec-9ed2-c1dd2b438e7f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xf216ee57aab5ce1b4d4f9ddd4985a9d17ff5908520257a3a91c91d601fccd3f6","name":"Katarzyna Kurdej","registered_at":"2026-06-20T20:50:16Z","symbol":"NIM1710451","token_address":"0x624e64ec08b686d4f1a08f542c24057af30cee04","type":"artist","uuid":"c42b92a7-98ad-45ec-9ed2-c1dd2b438e7f"}