Jan Kobuszewski
type: MusicGroup
description: Jan Kobuszewski is the name of: Jan Kobuszewski (actor) (born 1934), Polish actor and comedian Jan Kobuszewski (athlete) (born 1947), Polish long jumper
popularity: 3
followers: 489
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd773bb5eeb19c9ddc8b558a70da38c0ada165a13ded286b2c8940f284da25bdc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/71ffffdd-9deb-43a2-8da4-2bbe7b8459c0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/71ffffdd-9deb-43a2-8da4-2bbe7b8459c0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/71ffffdd-9deb-43a2-8da4-2bbe7b8459c0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd773bb5eeb19c9ddc8b558a70da38c0ada165a13ded286b2c8940f284da25bdc","name":"Jan Kobuszewski","registered_at":"2026-06-17T05:24:40Z","symbol":"NIM1294545","token_address":"0x115eab6eae25767d0c604e80d93e56080c9260c1","type":"artist","uuid":"71ffffdd-9deb-43a2-8da4-2bbe7b8459c0"}
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 0xd773bb5eeb19c9ddc8b558a70da38c0ada165a13ded286b2c8940f284da25bdc. 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/71ffffdd-9deb-43a2-8da4-2bbe7b8459c0.json and https://artists.proofprofile.net/proofs/artist/71ffffdd-9deb-43a2-8da4-2bbe7b8459c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xd773bb5eeb19c9ddc8b558a70da38c0ada165a13ded286b2c8940f284da25bdc","name":"Jan Kobuszewski","registered_at":"2026-06-17T05:24:40Z","symbol":"NIM1294545","token_address":"0x115eab6eae25767d0c604e80d93e56080c9260c1","type":"artist","uuid":"71ffffdd-9deb-43a2-8da4-2bbe7b8459c0"}