After the war, Kropinski moved to Breslau. His vast musical output was almost forgotten, although he enjoyed a minor revival in 1962, when several of his compositions were published by the Academy of Fine Arts in Berlin and later performed in a movie about concentration camp songs. Kropinski suffered a heart attack in 1966 and died in Breslau in 1970. Decades after his death, the songs that he wrote under Nazi internment, along with the works of Wojtowicz, were brought together to form the basis for Donald McCullough's Holocaust Cantata, which premiered at the Kennedy Centre in 1998. Many of Kropinski's and Wojtowicz's materials have been preserved in the extensive collection of Aleksander Kulisiewicz, which is held in the archives of the United States Holocaust Memorial Museum in Washington, D.C.
Musique dans les Camps de Concentration et les Camps d'Extermination (Online), Claude Torres
Ricorda cosa ti ha fatto Amalek - Giorno della Memoria 2006 (Online), International Service of Jewish-Christian Documentation.
Music and song bring to life tales of the Holocaust, (Online), CNN.