Lars Martinsson
type: MusicGroup
genre: classical
genre: opera
popularity: 4
followers: 7
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x40efa61b1379399dc22132bd3b7186c268822818398cc80393158e1f521e8d8c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954500
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954500
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c1f76db-0f19-494b-9754-1454a9f4694c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9c1f76db-0f19-494b-9754-1454a9f4694c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9c1f76db-0f19-494b-9754-1454a9f4694c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T04:47:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x40efa61b1379399dc22132bd3b7186c268822818398cc80393158e1f521e8d8c","name":"Lars Martinsson","registered_at":"2026-06-20T04:20:55Z","symbol":"NIM1509342","token_address":"0x49984acb29f5ef77d237476907b8c0694047d0f9","type":"artist","uuid":"9c1f76db-0f19-494b-9754-1454a9f4694c"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40efa61b1379399dc22132bd3b7186c268822818398cc80393158e1f521e8d8c. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c1f76db-0f19-494b-9754-1454a9f4694c.json and https://artists.proofprofile.net/proofs/artist/9c1f76db-0f19-494b-9754-1454a9f4694c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-20T04:47:29Z
  text: {"copyright_id":"0x40efa61b1379399dc22132bd3b7186c268822818398cc80393158e1f521e8d8c","name":"Lars Martinsson","registered_at":"2026-06-20T04:20:55Z","symbol":"NIM1509342","token_address":"0x49984acb29f5ef77d237476907b8c0694047d0f9","type":"artist","uuid":"9c1f76db-0f19-494b-9754-1454a9f4694c"}