Marcin Kaletka
type: MusicGroup
popularity: 3
followers: 107
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbda1d053c0b55ad8b2e8c440aa3fc886bcd740b5872464c4de2d7e15837855fe
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953882
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953882
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0a7e4ef6-0a65-4812-9c3e-dc62999c8e5e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0a7e4ef6-0a65-4812-9c3e-dc62999c8e5e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0a7e4ef6-0a65-4812-9c3e-dc62999c8e5e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T03:13:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xbda1d053c0b55ad8b2e8c440aa3fc886bcd740b5872464c4de2d7e15837855fe","name":"Marcin Kaletka","registered_at":"2026-06-15T17:12:32Z","symbol":"NIM0776159","token_address":"0xa5887ff848cc4ec8cf91bcb8d91f7568805c8ad6","type":"artist","uuid":"0a7e4ef6-0a65-4812-9c3e-dc62999c8e5e"}
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 0xbda1d053c0b55ad8b2e8c440aa3fc886bcd740b5872464c4de2d7e15837855fe. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a7e4ef6-0a65-4812-9c3e-dc62999c8e5e.json and https://artists.proofprofile.net/proofs/artist/0a7e4ef6-0a65-4812-9c3e-dc62999c8e5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0xbda1d053c0b55ad8b2e8c440aa3fc886bcd740b5872464c4de2d7e15837855fe","name":"Marcin Kaletka","registered_at":"2026-06-15T17:12:32Z","symbol":"NIM0776159","token_address":"0xa5887ff848cc4ec8cf91bcb8d91f7568805c8ad6","type":"artist","uuid":"0a7e4ef6-0a65-4812-9c3e-dc62999c8e5e"}