No musical recordings have entered the public domain due to expiration of copyright. Ever. When the U.S. Congress expanded copyright to sound recordings in 1972, it allowed existing sound recording copyright laws at the state level, some of which provide for a perpetual term, to continue for one full work-made-for-hire copyright term. This means all sound recordings produced before 1972 are under copyright in at least one U.S. state until 2067 (17 USC 301(c)
). If the songs were first published on or after January 1, 1923, the songs are not in the public domain in the United States. If at least one songwriter was surviving on or after January 1, 1944, the songs are not in the public domain in the European Union.