We have an article from 17 October 1938 that was news to us: Lotte Lehmann’s Records Banned in Austria: The Austrian authorities have announced a ban on records by Lotte Lehmann, Metropolitan Opera soprano. (She recently took out her first citizenship papers in the United States.) Miss Lehmann early in the Nazi regime refused an engagement with the Prussian State Opera, declaring she would not sing where her repertoire was limited to “Aryan” audiences. A voluntary exile from Germany, she has four “non-Aryan” step-children who escaped from Austria shortly after the Anschluss.
Lehmann’s autobiography, Anfang und Aufstieg, published in 1937, was banned by the Nazis on their list of harmful and undesirable writings