A group called the DC Counter-Inaugural Welcoming Committee organized a march in Washington DC on Inauguration Day that ended at McPherson Square (one of the sites of Occupy a few years ago). A bunch of speakers and groups read speeches and played music at the DisruptJ20 event.
Artists such as Son of None, Evan Greer, and Anti-Flag performed. Video of one of the songs Anti-Flag played is below.
Anti-Flag is on tour for the album American Spring.