Roman Ślefarski
type: MusicGroup
popularity: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf929788e514fc2977141017ad07b3bce3645c87d97b3dc6f6e3c23460bb6d628
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953871
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953871
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/06ea5157-7508-41e4-be1b-36200eb394e9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/06ea5157-7508-41e4-be1b-36200eb394e9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/06ea5157-7508-41e4-be1b-36200eb394e9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T01:46:03Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf929788e514fc2977141017ad07b3bce3645c87d97b3dc6f6e3c23460bb6d628","name":"Roman Ślefarski","registered_at":"2026-06-15T15:55:50Z","symbol":"NIM0757859","token_address":"0x5653842f0079305bfa0e2da33e15b7b5a25b167a","type":"artist","uuid":"06ea5157-7508-41e4-be1b-36200eb394e9"}
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 0xf929788e514fc2977141017ad07b3bce3645c87d97b3dc6f6e3c23460bb6d628. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06ea5157-7508-41e4-be1b-36200eb394e9.json and https://artists.proofprofile.net/proofs/artist/06ea5157-7508-41e4-be1b-36200eb394e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0xf929788e514fc2977141017ad07b3bce3645c87d97b3dc6f6e3c23460bb6d628","name":"Roman Ślefarski","registered_at":"2026-06-15T15:55:50Z","symbol":"NIM0757859","token_address":"0x5653842f0079305bfa0e2da33e15b7b5a25b167a","type":"artist","uuid":"06ea5157-7508-41e4-be1b-36200eb394e9"}