I haven't designed such a system and as you say I can't really prove anything, but the embedded software I worked on just didn't record anything like that. Of c

I haven't designed such a system and as you say I can't really prove anything, but the embedded software I worked on just didn't record anything like that. Of course one can always imagine a secret government firmware or whatever, it's just highly unlikely IMO. The most obvious proof I'd say is that there is no law mandating this, so nobody is going to bother doing it just for fun.