Maria Sumner
type: MusicGroup
popularity: 28
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x05ce79def6579944a8aca793d010f8946a333b714b9645b9971855f8077d502f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/56bec0f1-1f3e-4c15-aa0a-4e63e413a15c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/56bec0f1-1f3e-4c15-aa0a-4e63e413a15c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/56bec0f1-1f3e-4c15-aa0a-4e63e413a15c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x05ce79def6579944a8aca793d010f8946a333b714b9645b9971855f8077d502f","name":"Maria Sumner","registered_at":"2026-06-12T15:24:01Z","symbol":"NIM0112969","token_address":"0xe9f56ac70650f7665a1cb3b01ebd817f576d945a","type":"artist","uuid":"56bec0f1-1f3e-4c15-aa0a-4e63e413a15c"}
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 0x05ce79def6579944a8aca793d010f8946a333b714b9645b9971855f8077d502f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56bec0f1-1f3e-4c15-aa0a-4e63e413a15c.json and https://artists.proofprofile.net/proofs/artist/56bec0f1-1f3e-4c15-aa0a-4e63e413a15c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0x05ce79def6579944a8aca793d010f8946a333b714b9645b9971855f8077d502f","name":"Maria Sumner","registered_at":"2026-06-12T15:24:01Z","symbol":"NIM0112969","token_address":"0xe9f56ac70650f7665a1cb3b01ebd817f576d945a","type":"artist","uuid":"56bec0f1-1f3e-4c15-aa0a-4e63e413a15c"}