There are issues with the standard for what's defined as hires in the first place. When you can get stuff from the 60s in hires, clearly the concept is about the resolution of the first digital conversion and not about an idea of sound quality or clean recording.
There are various ways to catch the idiots who straight up oversampled(just by getting no content above a given frequency), and for some simple digitized files with no trick to them, maybe something like Musicscope(if it still exists?) would do.
But for anybody who's actively trying to pass content as hires, unless he's a moron, it's going to be extremely hard or impossible to know.
I've stopped caring about all that, if it sounds bad to me for any reason(from artistic taste to recording conditions), I get rid of it and that's that. It doesn't actually relate to being hires or not. In practice, we know that redbook can sound just like the rest, even research supporting some impact on humans, still confirm that they typically fail a blind test. So without a specific issue, does it matter? And if it was so night and day different, wouldn't all the self proclaims golden ear audiophiles be able to tell immediately without some app?
