Let me explain it with an example:
Consider that timestamp of today is 1262304000000 (2010-01-01 00:00:00.00) and you have a web page (or file) with content "AAA". Content on this page may change over time however, you know you'll need to somehow prove that the content of the page on timestamp 1262304000000 was exactly "AAA".
Saying that services like archive.org are not considered as a proof, what would you do to make the data provable on specific time? Is there any way at all?
