Last year’s Music Modernization Act created a powerful new structure to collect and distribute digital streaming royalties to songwriters and publishers. But passing the law was only the first step. Now what’s written on paper needs to be implemented and put in motion — a responsibility of the U.S. Copyright Office, under the supervision and oversight of Congress. Perhaps the most important issue on the table, and one that is expected to be a major focus of the Copyright Office oversight hearing of the House Judiciary Committee on Wednesday, is the official designation of a group to manage the MMA’s new Mechanical Licensing Collective (MLC).