Very well. I'll offer as proof the observation that when you say "a mind is required" for there to be information, you will NEVER volunteer that the "mind" in question is the mind of the person who looked at it and decided it was "information".
What sort of proof is that? I repeat I have never observed my great-grandfather.
Plus your "definition" of information is pretty useless. Its seems a conclusion using your premise is that outside of a specific mind being discussed there is no information. And it would seem that this is not information