Janusz Mackiewicz
type: MusicGroup
popularity: 4
followers: 115
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb0377313faead6646f0d22abe78a9a2bd0098d0f0a444eefad908b40e5d63d9c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f18c3c25-1755-4ce9-980b-e3d28a0b5bc9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f18c3c25-1755-4ce9-980b-e3d28a0b5bc9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f18c3c25-1755-4ce9-980b-e3d28a0b5bc9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb0377313faead6646f0d22abe78a9a2bd0098d0f0a444eefad908b40e5d63d9c","name":"Janusz Mackiewicz","registered_at":"2026-06-21T13:04:06Z","symbol":"NIM1930270","token_address":"0x1f64b75282e5760f32b9853339da54d53bda4dcf","type":"artist","uuid":"f18c3c25-1755-4ce9-980b-e3d28a0b5bc9"}
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 0xb0377313faead6646f0d22abe78a9a2bd0098d0f0a444eefad908b40e5d63d9c. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f18c3c25-1755-4ce9-980b-e3d28a0b5bc9.json and https://artists.proofprofile.net/proofs/artist/f18c3c25-1755-4ce9-980b-e3d28a0b5bc9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0xb0377313faead6646f0d22abe78a9a2bd0098d0f0a444eefad908b40e5d63d9c","name":"Janusz Mackiewicz","registered_at":"2026-06-21T13:04:06Z","symbol":"NIM1930270","token_address":"0x1f64b75282e5760f32b9853339da54d53bda4dcf","type":"artist","uuid":"f18c3c25-1755-4ce9-980b-e3d28a0b5bc9"}
album: Integrated circuit, Uklad scalony
  type: MusicAlbum
  date published: 2010-11-23