Jacek Perkowski
type: MusicGroup
popularity: 5
followers: 51
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfc41cf0a77bb681dbc91cc7d00e1fd1fe5ab21dd2dc9ad11e250068de605fe44
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954603
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954603
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4b25efa-a894-48a6-a230-f1f8f40e5410.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c4b25efa-a894-48a6-a230-f1f8f40e5410.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c4b25efa-a894-48a6-a230-f1f8f40e5410
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T21:47:54Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfc41cf0a77bb681dbc91cc7d00e1fd1fe5ab21dd2dc9ad11e250068de605fe44","name":"Jacek Perkowski","registered_at":"2026-06-20T20:29:06Z","symbol":"NIM1707297","token_address":"0x01f0b8eda6940796fee2ea5de0f4a371f3c327d4","type":"artist","uuid":"c4b25efa-a894-48a6-a230-f1f8f40e5410"}
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 0xfc41cf0a77bb681dbc91cc7d00e1fd1fe5ab21dd2dc9ad11e250068de605fe44. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4b25efa-a894-48a6-a230-f1f8f40e5410.json and https://artists.proofprofile.net/proofs/artist/c4b25efa-a894-48a6-a230-f1f8f40e5410.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T21:47:54Z
  text: {"copyright_id":"0xfc41cf0a77bb681dbc91cc7d00e1fd1fe5ab21dd2dc9ad11e250068de605fe44","name":"Jacek Perkowski","registered_at":"2026-06-20T20:29:06Z","symbol":"NIM1707297","token_address":"0x01f0b8eda6940796fee2ea5de0f4a371f3c327d4","type":"artist","uuid":"c4b25efa-a894-48a6-a230-f1f8f40e5410"}