A large group of music industry heavyweights are lining up to fight for reform of the Digital Millennium Copyright Act, which many feel doesn’t compensate artists fairly for online distribution of their music.

Big names like Taylor Swift, Paul McCartney and U2 headline the 180 recording artists and songwriters who will appear in an ad Tuesday calling for reform of the law, enacted in 1998. They are specifically trying to stop YouTube from using the DMCA to justify why the site is allowed to use artists’ music without it being considered copyright infringement.