There is such a thing, actually. Not explicitly, but international copyright law has been largely harmonized through the Berne Convention. With 179 signatories

There is such a thing, actually. Not explicitly, but international copyright law has been largely harmonized through the Berne Convention. With 179 signatories its a pretty universal 'floor' for copyright protections. The only big abstention was the USSR and they aren't around anymore. https://en.wikipedia.org/wiki/Berne_Convention https://en.wikipedia.org/wiki/Berne_Convention