I don't know how to call this kind of proof in English, but maybe if I explain it a little bit further you'll get the idea.
Basically I want to create video/audio proof that something was shot in 2013 and have this "proof" video as evidence later, in 2015.
The question is what to do so the people will believe that the video from back in the days is authentic and not fabricated in 2015.
- I was thinking that it should be one-taker and that
- it should contain some evidence of the date and time and
- some things that were unique for that time and don't exist anymore or something like that e.g. building that will be destroyed, people who will be dead in 2 years ;D etc.
But I need something easier to accomplish, because the newspapers and TV, radio could be faked. Something more bullet proof would be needed.
Any ideas how to accomplish that? Thanks in advance for every take on this. I am really curious how would you solved this problem.