Todd Spangler NY Digital EditorTwitter is in the crosshairs of the music industry and nearly two dozen U.S. lawmakers over the issue of music copyright infringement.A bipartisan group of 22 members of the House of Representatives sent a letter Monday to Twitter chief Jack Dorsey, demanding the social network address “the ongoing problem of copyright infringement on Twitter and the platform’s apparent refusal to address it.” They requested a response to their inquiry by Aug.