Jan Krenz
type: MusicGroup
description: Jan Krenz (14 July 1926 – 15 September 2020) was a Polish composer and orchestra conductor. Biography During World War II, Krenz studied piano with Zbigniew Drzewiecki and composition with Kazimierz
popularity: 9
followers: 71
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x945b45e0ca53bcbf650c342b63d2550e7ecf655a0a2ea2ec35fc283a2855e6b1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4ec1093e-b6c8-43da-9c2d-e035a7b6c5b8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4ec1093e-b6c8-43da-9c2d-e035a7b6c5b8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4ec1093e-b6c8-43da-9c2d-e035a7b6c5b8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x945b45e0ca53bcbf650c342b63d2550e7ecf655a0a2ea2ec35fc283a2855e6b1","name":"Jan Krenz","registered_at":"2026-06-16T17:01:19Z","symbol":"NIM1117160","token_address":"0xf012d98948736774f436c242ce15f5ed20c7d540","type":"artist","uuid":"4ec1093e-b6c8-43da-9c2d-e035a7b6c5b8"}
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 0x945b45e0ca53bcbf650c342b63d2550e7ecf655a0a2ea2ec35fc283a2855e6b1. 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/4ec1093e-b6c8-43da-9c2d-e035a7b6c5b8.json and https://artists.proofprofile.net/proofs/artist/4ec1093e-b6c8-43da-9c2d-e035a7b6c5b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x945b45e0ca53bcbf650c342b63d2550e7ecf655a0a2ea2ec35fc283a2855e6b1","name":"Jan Krenz","registered_at":"2026-06-16T17:01:19Z","symbol":"NIM1117160","token_address":"0xf012d98948736774f436c242ce15f5ed20c7d540","type":"artist","uuid":"4ec1093e-b6c8-43da-9c2d-e035a7b6c5b8"}