Since the status of the bankruptcy happened in the start of 2014, there is not much information on the web.
I wrote this article in order to seek answers from people who might have some (and share them with everyone).
I wrote a mail to the mail address I received a mail from, and I will edit this article with information I could receive.
The last known date for filling proofs is May 29 2015. That's all that we know. I hope there will soon be a procedure for sending proofs.
MtGox is dead. Long life to bitcoin.