The human brain is only 10% functional, at best.
The first to outline this theory, later proved a fact by others, was Australian Neurology Nobel Laureate Sir John Eccles. (Lecture: University of
Colorado, University Memorial Center Boulder, July 31, 1974.) "The brain indicates its powers are endless."
Chronologic time is an illusion, time it doesn't exist. We live in an eternal now. In the moment that Im writing this text im borning, the second
world war has begun, Hitler will born. Etc.. I think that it's possible change the past.
The funny thing is I tried something very similar once.
I wrote a note to myself telling my future self to get in a time machine, go back in time and leave a message for my current self to prove time travel
would exist. Problem is I didn't show up (my future self didn't show) and because I didn't show up I ended up loosing the note I wrote. Thing is
the reason my future self never showed up could be because I lost the note
So in theory your idea could work, we'd just have to build something ultra durable with the info on it and hope that sometime in the future we can
travel back in time. Just cross your fingers and hope the Universe doesn't implode