It would be impossible to give a formal proof of correctness.  (For the reasons why this is impossible, I suggest an introductory course in formal logic at any university.)  The information can however easily be proven wrong by giving one single counterexample.  I.e. an example which contradict the hypothesis.  As long as no counterexamples are found, and there are a lot of confirmations, I assume the information (hypothesis) to be correct, and you missed my ass by miles.  In case other people want to know about where I got the 10 days from: I let someone from MtGox support have a look at my previous version, and got some clarifications and updates.  The reduction from 20 to 10 days happened very recently.

I am just a normal customer of MtGox.  I never did any work for MtGox, nor did I ever receive any form of compensation from MtGox for providing facts here or elsewhere.