Legally, you can take this to the Supreme Court, but only if you are able to show monetary loss due to the case and that the incident was done with malice and forethought.
Nope.
There are no legal protections for magic tricks other than patents. As the vast majority of ideals in magic are so derivitive, it is hard to establish that someone 'with reasonable knowledge of the art' would not have come up with the same idea.
Copyright applies only to specific incarnations of media - they can't sell a copy of your book or dvd, for example.
Malice and forethought have nothing to do with ip cases. Libel and slander cases, yes - but not ip.
Finally, the supreme court does not try matters of fact but proceedure and constitutionality. It is a court of appeals. It would never get to them.