He was the leading baritone at the Cologne Opera from 1964 until his tragic death on stage there ten years later, where he covered the major roles for his voice part.

[1] After his return to Germany, he made his debut as Nardo in Mozart's La finta giardiniera at the Bavarian State Opera in Munich in 1961.

[1] In Berlin, he appeared in the title role of Rossini's Der Barbier von Sevilla in 1968, staged by Ruth Berghaus, and alongside Sylvia Geszty as Rosina and Peter Schreier as the Count.

[1] Anheisser was featured in recordings of broadcaster Westdeutscher Rundfunk (WDR), such as a 1967 production of Donizetti's Anna Bolena, as Rochefort alongside Teresa Żylis-Gara in the title role and Karl Ridderbusch as Henry VIII, conducted by Alberto Erede.

[7] In a New Year's Day performance of Carl Millöcker's Der Bettelstudent with him in the title role, he fell from a balcony onto the stage when the security device for a jump failed.