The Chicago Town Polka Band
type: MusicGroup
genre: polka
popularity: 2
followers: 126
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa3eff9efba1820503ec44937ef15f4d8dc008a4b49d1dabf3bbbb07b1d3332a8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/686e700a-9b41-4591-aca5-fd6ba98034bf.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/686e700a-9b41-4591-aca5-fd6ba98034bf.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/686e700a-9b41-4591-aca5-fd6ba98034bf
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa3eff9efba1820503ec44937ef15f4d8dc008a4b49d1dabf3bbbb07b1d3332a8","name":"The Chicago Town Polka Band","registered_at":"2026-06-17T02:01:39Z","symbol":"NIM1246083","token_address":"0x84d29a371a9845cd974e61fefe6f8440aa94167e","type":"artist","uuid":"686e700a-9b41-4591-aca5-fd6ba98034bf"}
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 0xa3eff9efba1820503ec44937ef15f4d8dc008a4b49d1dabf3bbbb07b1d3332a8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/686e700a-9b41-4591-aca5-fd6ba98034bf.json and https://artists.proofprofile.net/proofs/artist/686e700a-9b41-4591-aca5-fd6ba98034bf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xa3eff9efba1820503ec44937ef15f4d8dc008a4b49d1dabf3bbbb07b1d3332a8","name":"The Chicago Town Polka Band","registered_at":"2026-06-17T02:01:39Z","symbol":"NIM1246083","token_address":"0x84d29a371a9845cd974e61fefe6f8440aa94167e","type":"artist","uuid":"686e700a-9b41-4591-aca5-fd6ba98034bf"}
album: Chicago Style Polkas
  type: MusicAlbum
  date published: 2008-01-01