I don’t know how trademark and copyright laws differ, but I think this is more of a trademark issue if it makes a difference at all.
There are other examples. Champagne has to come from the champagne region of France. Just like Bordeaux. Port comes from Portugal. Technically, to be a Bourbon it has to come from Bourbon County, KY... Though that seems to be less enforced.
The thing with trademarks though is they have to be vigorously defended every time they’re infringed. Once you start letting others get away with using your trademark, you lose it. Something like this, where it has -never- really been enforced before... Seems like a horse/barn situation. It’s way too late to start asserting a TM now, after decades of inattention.
“Technically, to be a Bourbon it has to come from Bourbon County, KY.”
Actually, bourbon can be made pretty much anywhere in the US; the laws regarding bourbon pertain mainly to the ingredients used. But the good stuff comes from Kentucky.
And interestingly enough, there are no major bourbon producers based in present-day Bourbon County. The original county was much larger and has been subdivided numerous times.