Kruk
type: MusicGroup
genre: album rock
description: Kruk may refer to: People Kruk (surname) Kruk, a nickname of Mike Krukow's Other uses Kruk, a fictional legal concept of dwarfs in Discworld PZL-106 Kruk, a Polish aircraft Kruk, the native Polish tit
popularity: 5
followers: 993
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xeaecc751ce960e8c3fda1b9707c4ba99fbb7e584290aacc789c834e6b99c84e6
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/50a0a7af-cc88-4545-b662-f5c7cc1870c7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/50a0a7af-cc88-4545-b662-f5c7cc1870c7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/50a0a7af-cc88-4545-b662-f5c7cc1870c7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
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 0xeaecc751ce960e8c3fda1b9707c4ba99fbb7e584290aacc789c834e6b99c84e6. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50a0a7af-cc88-4545-b662-f5c7cc1870c7.json and https://artists.proofprofile.net/proofs/artist/50a0a7af-cc88-4545-b662-f5c7cc1870c7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
album: Before He'll Kill You
  type: MusicAlbum
  date published: 2009-01-01
album: It Will Not Come Back
  type: MusicAlbum
  date published: 2011
album: Before
  type: MusicAlbum
  date published: 2014
album: Before
  type: MusicAlbum
  date published: 2014-06-09
album: Beyond Live
  type: MusicAlbum
  date published: 2016-04-01
album: ВОРОН
  type: MusicAlbum
  date published: 2019-03-18
album: Be There
  type: MusicAlbum
  date published: 2021-05-07
album: Live At Rock Pogoria
  type: MusicAlbum
  date published: 2023-04-14