Lena Lootens/La Petite Bande/Sigiswald Kuijken
type: MusicGroup
genre: opera
popularity: 2
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa9151392f8843b84dddcfbac83d0f625f899220eb1e1baf4cf959bc60f13617f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953899
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953899
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/10f30c37-e1a0-4a6d-bb39-1a1592161fc4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/10f30c37-e1a0-4a6d-bb39-1a1592161fc4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/10f30c37-e1a0-4a6d-bb39-1a1592161fc4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T06:37:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa9151392f8843b84dddcfbac83d0f625f899220eb1e1baf4cf959bc60f13617f","name":"Lena Lootens/La Petite Bande/Sigiswald Kuijken","registered_at":"2026-06-15T19:41:54Z","symbol":"NIM0811808","token_address":"0xfe6016862a7f9ec77b91e13ced8a8b68eca806b5","type":"artist","uuid":"10f30c37-e1a0-4a6d-bb39-1a1592161fc4"}
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 0xa9151392f8843b84dddcfbac83d0f625f899220eb1e1baf4cf959bc60f13617f. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10f30c37-e1a0-4a6d-bb39-1a1592161fc4.json and https://artists.proofprofile.net/proofs/artist/10f30c37-e1a0-4a6d-bb39-1a1592161fc4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0xa9151392f8843b84dddcfbac83d0f625f899220eb1e1baf4cf959bc60f13617f","name":"Lena Lootens/La Petite Bande/Sigiswald Kuijken","registered_at":"2026-06-15T19:41:54Z","symbol":"NIM0811808","token_address":"0xfe6016862a7f9ec77b91e13ced8a8b68eca806b5","type":"artist","uuid":"10f30c37-e1a0-4a6d-bb39-1a1592161fc4"}