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Why would you need a blockchain to cryptographically sign video footage?

• nybble41 7y ago
  Recording a hash of a video in the Bitcoin blockchain creates public evidence that the video existed at a specific point in time. If that point is very soon after the events portrayed in the video then it can increase confidence in the video's authenticity.
  • astrodust 7y ago
    Proves nothing about authenticity. Requires an internet connection which means in many cases it's completely impractical.
  • anigbrowl 7y ago
    I think it would be more like prior art, to distinguish originals from copies rather than to authenticate the content itself. Given two pieces of similar-but-different video the one with the earliest timestamp is presumably the original.