Over 1,500 creators have signed a letter sent to to US Congress "affirming core copyright principles held by the creative community."

Signatories include creators in the fields of film and television, book publishing, photography, graphic design, and music communities, as well as leaders of creative unions and guilds, among them Rick Carnes, president of the Songwriters Guild of America (pictured), musician, composer and producer T Bone Burnett, and filmmakers such as Taylor Hackford.

The move comes as the ...