Lasse Pöysti
type: MusicGroup
genre: opera
description: Lasse Erik Pöysti (; 24 January 1927 – 5 April 2019) was a Finnish actor, director, theatre manager and writer. Biography Pöysti, a Finnish Karelian and Swedish-speaking Finn, was born in Sortaval
popularity: 16
followers: 88
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additional property: OTSVerifyInstructions
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  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
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  date published: 2026-06-14T09:36:10Z
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album: Pekka ja susi
  type: MusicAlbum
  date published: 1978
album: Prokofiev, S.: Peter and the Wolf / Poulenc, F.: the Story of Babar, the Little Elephant
  type: MusicAlbum
  date published: 1992-01-01
album: Iltasatuja
  type: MusicAlbum
  date published: 1997
  track: Chapter 1.1 - Iltasatuja
    type: MusicRecording
    duration: PT3M17S
    duration ms: 197000
    explicit: false
    by artist: Lasse Pöysti
    in album: Iltasatuja
      type: MusicAlbum
      date published: 1997
    genre: opera
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
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      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c59dbd29b2d1c8b2c912c1592b47e480b1059ec46057376d047e052d4da7ae. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ90587624.
      date published: 2026-07-22T10:01:58Z
    audio: Chapter 1.1 - Iltasatuja
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      additional property: Danceability
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Loudness (dB)
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      additional property: Key Name
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        value: A
      additional property: Mode Name
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