Piotr Kępiński
type: MusicGroup
genre: classical piano
popularity: 2
followers: 46
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x151ab3d36620fbf62c0adc3136ed629ca87e84327f167ab3ee83231650eaf243
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953984
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953984
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2cb0ef49-d634-47e5-bd16-b77949f460d5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2cb0ef49-d634-47e5-bd16-b77949f460d5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2cb0ef49-d634-47e5-bd16-b77949f460d5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:08:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x151ab3d36620fbf62c0adc3136ed629ca87e84327f167ab3ee83231650eaf243","name":"Piotr Kępiński","registered_at":"2026-06-16T05:25:25Z","symbol":"NIM0951099","token_address":"0x43434549e52601422c1f3b3c6b7f31eb9a9e6971","type":"artist","uuid":"2cb0ef49-d634-47e5-bd16-b77949f460d5"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151ab3d36620fbf62c0adc3136ed629ca87e84327f167ab3ee83231650eaf243. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cb0ef49-d634-47e5-bd16-b77949f460d5.json and https://artists.proofprofile.net/proofs/artist/2cb0ef49-d634-47e5-bd16-b77949f460d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:08:34Z
  text: {"copyright_id":"0x151ab3d36620fbf62c0adc3136ed629ca87e84327f167ab3ee83231650eaf243","name":"Piotr Kępiński","registered_at":"2026-06-16T05:25:25Z","symbol":"NIM0951099","token_address":"0x43434549e52601422c1f3b3c6b7f31eb9a9e6971","type":"artist","uuid":"2cb0ef49-d634-47e5-bd16-b77949f460d5"}
album: Maciejewski: Transcriptions for 2 Pianos, Vol. 1
  type: MusicAlbum
  date published: 2017-07-21