Zygmunt Sierakowski
type: MusicGroup
description: Zygmunt Erazm Gaspar Józef Sierakowski (, ; 19 May 1826, – 27 June 1863, Vilnius) was a Polish leader of the January Uprising in lands of the former Grand Duchy of Lithuania in the Polish–Lithuanian C
popularity: 4
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd710a17d247b6ba01516e80c1a3011cfb3d27f19162091ea1198ed2a04dd1ece
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/79c0d22e-2c6d-4ccc-92b8-700deb35e7d1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/79c0d22e-2c6d-4ccc-92b8-700deb35e7d1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/79c0d22e-2c6d-4ccc-92b8-700deb35e7d1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd710a17d247b6ba01516e80c1a3011cfb3d27f19162091ea1198ed2a04dd1ece","name":"Zygmunt Sierakowski","registered_at":"2026-06-17T08:05:07Z","symbol":"NIM1332792","token_address":"0x042701ba0ce4f242f3825a8fc4570acd2e69f737","type":"artist","uuid":"79c0d22e-2c6d-4ccc-92b8-700deb35e7d1"}
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 0xd710a17d247b6ba01516e80c1a3011cfb3d27f19162091ea1198ed2a04dd1ece. 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/79c0d22e-2c6d-4ccc-92b8-700deb35e7d1.json and https://artists.proofprofile.net/proofs/artist/79c0d22e-2c6d-4ccc-92b8-700deb35e7d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xd710a17d247b6ba01516e80c1a3011cfb3d27f19162091ea1198ed2a04dd1ece","name":"Zygmunt Sierakowski","registered_at":"2026-06-17T08:05:07Z","symbol":"NIM1332792","token_address":"0x042701ba0ce4f242f3825a8fc4570acd2e69f737","type":"artist","uuid":"79c0d22e-2c6d-4ccc-92b8-700deb35e7d1"}