Joanna Marcinkiewicz
type: MusicGroup
genre: sea shanties
popularity: 5
followers: 9
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x46f2407497aa0e45043f218186c8bcb57e648cec190531a0726ba08a4a0df2c8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954055
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954055
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/434c11bf-2f3d-489e-afa8-02fab8f457f1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/434c11bf-2f3d-489e-afa8-02fab8f457f1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/434c11bf-2f3d-489e-afa8-02fab8f457f1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T05:51:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x46f2407497aa0e45043f218186c8bcb57e648cec190531a0726ba08a4a0df2c8","name":"Joanna Marcinkiewicz","registered_at":"2026-06-16T13:01:47Z","symbol":"NIM1060012","token_address":"0x6ef3a33ad4680c1f54b2194929f1fd934b1aa4c4","type":"artist","uuid":"434c11bf-2f3d-489e-afa8-02fab8f457f1"}
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 0x46f2407497aa0e45043f218186c8bcb57e648cec190531a0726ba08a4a0df2c8. 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/434c11bf-2f3d-489e-afa8-02fab8f457f1.json and https://artists.proofprofile.net/proofs/artist/434c11bf-2f3d-489e-afa8-02fab8f457f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x46f2407497aa0e45043f218186c8bcb57e648cec190531a0726ba08a4a0df2c8","name":"Joanna Marcinkiewicz","registered_at":"2026-06-16T13:01:47Z","symbol":"NIM1060012","token_address":"0x6ef3a33ad4680c1f54b2194929f1fd934b1aa4c4","type":"artist","uuid":"434c11bf-2f3d-489e-afa8-02fab8f457f1"}