The date Nov. 2017 is proof because you can see that password changed today for slimboard account and today I locked it.
https://bitcointalk.org/seclog.php
Send the information over to theymos/cyrus and they'll have to decide whether the information you have presented will be sufficient enough to recover the account. Follow this post here: https://bitcointalksearch.org/topic/recovering-hacked-accounts-or-accounts-with-lost-passwords-497545
Be patient though, as recovering accounts doesn't seem to be a high priority and they are currently backlogged. It could take several months to get a response or a matter of days. Depends on the case.
Thank's for the information. I have done it.
I thinked the post in Meta to go this process faster.