Lasse Havu
type: MusicGroup
genre: finnish pop
genre: finnish rock
genre: iskelmä
popularity: 28
followers: 871
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf7ba6e6ea5415bad498f7ef0cc51700c5352a37b2caecedaa8030068ec9b5e7a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953408
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953408
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7ce41381-694a-4555-8ab3-acb5673e98f8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7ce41381-694a-4555-8ab3-acb5673e98f8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7ce41381-694a-4555-8ab3-acb5673e98f8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:28:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf7ba6e6ea5415bad498f7ef0cc51700c5352a37b2caecedaa8030068ec9b5e7a","name":"Lasse Havu","registered_at":"2026-06-12T02:38:09Z","symbol":"NIM0161469","token_address":"0x527cb0dc31a7d4b663b2ec490912889dab09fc53","type":"artist","uuid":"7ce41381-694a-4555-8ab3-acb5673e98f8"}
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 0xf7ba6e6ea5415bad498f7ef0cc51700c5352a37b2caecedaa8030068ec9b5e7a. 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/7ce41381-694a-4555-8ab3-acb5673e98f8.json and https://artists.proofprofile.net/proofs/artist/7ce41381-694a-4555-8ab3-acb5673e98f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0xf7ba6e6ea5415bad498f7ef0cc51700c5352a37b2caecedaa8030068ec9b5e7a","name":"Lasse Havu","registered_at":"2026-06-12T02:38:09Z","symbol":"NIM0161469","token_address":"0x527cb0dc31a7d4b663b2ec490912889dab09fc53","type":"artist","uuid":"7ce41381-694a-4555-8ab3-acb5673e98f8"}
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  type: MusicAlbum
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