Lauri Ketonen
type: MusicGroup
genre: iskelmä
popularity: 2
followers: 87
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x52cd1c5e3a9fa54c00de3f197e28189b205ae1b8fa839ea4c38f388759cfd11a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954027
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954027
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/39508c54-4d27-4006-9194-bc62ee9027ae.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/39508c54-4d27-4006-9194-bc62ee9027ae.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/39508c54-4d27-4006-9194-bc62ee9027ae
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T00:55:08Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x52cd1c5e3a9fa54c00de3f197e28189b205ae1b8fa839ea4c38f388759cfd11a","name":"Lauri Ketonen","registered_at":"2026-06-16T09:30:50Z","symbol":"NIM1009685","token_address":"0x208da45045116a3e9d6c8894ca7a1f40361246de","type":"artist","uuid":"39508c54-4d27-4006-9194-bc62ee9027ae"}
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 0x52cd1c5e3a9fa54c00de3f197e28189b205ae1b8fa839ea4c38f388759cfd11a. 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/39508c54-4d27-4006-9194-bc62ee9027ae.json and https://artists.proofprofile.net/proofs/artist/39508c54-4d27-4006-9194-bc62ee9027ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x52cd1c5e3a9fa54c00de3f197e28189b205ae1b8fa839ea4c38f388759cfd11a","name":"Lauri Ketonen","registered_at":"2026-06-16T09:30:50Z","symbol":"NIM1009685","token_address":"0x208da45045116a3e9d6c8894ca7a1f40361246de","type":"artist","uuid":"39508c54-4d27-4006-9194-bc62ee9027ae"}
album: Jouluyön ihme
  type: MusicAlbum
  date published: 2019-12-15
album: Hellästi solmussa
  type: MusicAlbum
  date published: 2025-06-13