Henryk Krawczyk
type: MusicGroup
description: Henryk Krawczyk (born 1946 in Poland) is a professor and rector of Gdańsk University of Technology since 2008. Scientific degrees MS in Design Computer Architecture, GUT, 1969 PhD in Analysis Tes
popularity: 3
followers: 20
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xba57c8d454c233ca9e1ecb9944160e29aa9201f57685f1f61acc758200aae80b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954055
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954055
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/438da36d-be61-4a15-8b68-97c98597c9e1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/438da36d-be61-4a15-8b68-97c98597c9e1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/438da36d-be61-4a15-8b68-97c98597c9e1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T05:51:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xba57c8d454c233ca9e1ecb9944160e29aa9201f57685f1f61acc758200aae80b","name":"Henryk Krawczyk","registered_at":"2026-06-16T13:06:19Z","symbol":"NIM1061098","token_address":"0x4cb3f1e1785fa08a8ac9d1371232351ddf86347f","type":"artist","uuid":"438da36d-be61-4a15-8b68-97c98597c9e1"}
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 0xba57c8d454c233ca9e1ecb9944160e29aa9201f57685f1f61acc758200aae80b. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/438da36d-be61-4a15-8b68-97c98597c9e1.json and https://artists.proofprofile.net/proofs/artist/438da36d-be61-4a15-8b68-97c98597c9e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T05:51:24Z
  text: {"copyright_id":"0xba57c8d454c233ca9e1ecb9944160e29aa9201f57685f1f61acc758200aae80b","name":"Henryk Krawczyk","registered_at":"2026-06-16T13:06:19Z","symbol":"NIM1061098","token_address":"0x4cb3f1e1785fa08a8ac9d1371232351ddf86347f","type":"artist","uuid":"438da36d-be61-4a15-8b68-97c98597c9e1"}