Hey, is there a way to use the copyright tag in a more broad sense? Like, you want to see everything that’s got a copyright tag already, but you don’t wanna focus on a specific series and vice versa?

There's some useful metatags that support range operations. copytags:>0 or copytags:>=1 will find all posts with at least 1 copyright tag. See the cheatsheet for more.

If you just want to see posts that have at least one copyright tag, you can search copytags:>0

The cheatsheet has a useful list of stuff like this.