Music Modernization Act This bill makes various changes to copyright law related to sound recordings, including providing protection for sound recordings fixed before February 15, 1972, creating a system for paying royalties to producers and sound engineers, and establishing a statutory blanket license for digital music services. The blanket license allows music services to distribute sound recordings covered by the license without negotiating for the rights for each individual recording, as long as the music service complies with the license's requirements, such as paying the required royalties.