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You check the hash of the audio into the chain.

• capableweb 3y ago
  Same problem. Doesn't prove that it was created at that point, only that it existed at that point.
  • MrBigplan 3y ago
    Yep. As I stated, you can falsify an event happening later than it really did by prerecording and only uploading later, but you can't fake that it happened after uploading. With clever cross-referencing, it might even be possible to prove decisively when the file was created.
  • Mandatum 3y ago
    Post the hash online?
    • graypegg 3y ago
      Because the audio is only your half of the conversation, you could just record what would be convenient to have said before the conversation, then say something different, and just upload your prepared file. It’s not like just because it’s in a blockchain, its content is truthful. It just confirms it followed the rules of the blockchain.