Kupiński Guitar Duo
type: MusicGroup
popularity: 2
followers: 496
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdc25eb558fad610084975c70bd9b384e0e5a8b6c4140d4ea8f70014424b16b5f
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/542b102d-0380-4070-9146-326fd839f54c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/542b102d-0380-4070-9146-326fd839f54c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/542b102d-0380-4070-9146-326fd839f54c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdc25eb558fad610084975c70bd9b384e0e5a8b6c4140d4ea8f70014424b16b5f","name":"Kupiński Guitar Duo","registered_at":"2026-06-16T18:53:09Z","symbol":"NIM1143848","token_address":"0x208b4ef4564444c0b3b023b9a7891da19b28660b","type":"artist","uuid":"542b102d-0380-4070-9146-326fd839f54c"}
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 0xdc25eb558fad610084975c70bd9b384e0e5a8b6c4140d4ea8f70014424b16b5f. 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/542b102d-0380-4070-9146-326fd839f54c.json and https://artists.proofprofile.net/proofs/artist/542b102d-0380-4070-9146-326fd839f54c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0xdc25eb558fad610084975c70bd9b384e0e5a8b6c4140d4ea8f70014424b16b5f","name":"Kupiński Guitar Duo","registered_at":"2026-06-16T18:53:09Z","symbol":"NIM1143848","token_address":"0x208b4ef4564444c0b3b023b9a7891da19b28660b","type":"artist","uuid":"542b102d-0380-4070-9146-326fd839f54c"}
album: Spanish Music
  type: MusicAlbum
  date published: 2011-05-02
album: Rossini - Chopin - Bogdanovic - Piazzolla - Gershwin - Granados
  type: MusicAlbum
  date published: 2016-03-02
album: Kupiński Guitar Duo Goes Modern
  type: MusicAlbum
  date published: 2021-11-28