Astrid and Mirjam
type: MusicGroup
genre: polka
popularity: 6
followers: 422
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x94ad9e3df0dcaa0ea10833a9877ddae3808faa05abe487d398efbebe5be49998
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954131
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954131
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7d4a3ff8-cef9-4225-8c16-053b7124e092.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7d4a3ff8-cef9-4225-8c16-053b7124e092.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7d4a3ff8-cef9-4225-8c16-053b7124e092
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:19:19Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x94ad9e3df0dcaa0ea10833a9877ddae3808faa05abe487d398efbebe5be49998","name":"Astrid and Mirjam","registered_at":"2026-06-17T09:21:15Z","symbol":"NIM1350939","token_address":"0xb58ebb5ac8348e0860affbc9ad751175ec67c018","type":"artist","uuid":"7d4a3ff8-cef9-4225-8c16-053b7124e092"}
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 0x94ad9e3df0dcaa0ea10833a9877ddae3808faa05abe487d398efbebe5be49998. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d4a3ff8-cef9-4225-8c16-053b7124e092.json and https://artists.proofprofile.net/proofs/artist/7d4a3ff8-cef9-4225-8c16-053b7124e092.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-18T03:01:36Z
  text: {"copyright_id":"0x94ad9e3df0dcaa0ea10833a9877ddae3808faa05abe487d398efbebe5be49998","name":"Astrid and Mirjam","registered_at":"2026-06-17T09:21:15Z","symbol":"NIM1350939","token_address":"0xb58ebb5ac8348e0860affbc9ad751175ec67c018","type":"artist","uuid":"7d4a3ff8-cef9-4225-8c16-053b7124e092"}