I actually don't think it's as hopeless to get property rights correct (in many cases) as you do, because most of those historical issues will end up being irrelevant. The current owner is the person with the longest unbroken chain of title transfers and those generally don't go back very far.

I don't believe in a statute of limitations in these matters, If you can demonstrate that something was rightfully owned by someone who passed it down to you, then you ought to be recognized as the rightful owner.

I also don't think the right approach is to try to figure out exactly who owns what. Rather, we should just be trying to resolve disputes about who owns what. I'm sure I live on stolen land, but no one else is claiming to own it (apart from the government sort of), so for now it's mine.

I'd still encourage you to make a post about the future of property titles, even if you don't have all the answers. If you lay out how you're thinking about it and what you aren't sure about, I bet it would generate an interesting conversation.