There are numerous scams where famous composers have taken traditional folk tunes and registered them under their name. Allegedly (don't want to get into trouble here) the names Simon & Garfunkel (Scarborough Fair) as well as Harry Belafonte (numerous) have allegedly been uttered.... ahem....
Vanilla Ice claiming that their song Ice Ice Baby had nothing to to with Under Pressure was a hilarious case:
Duke Ellington's early publisher, Irving Mills, insisted all tracks have him as composer listed, even though Irving Mills could not write music, and to this day these tunes are credited to Irving Mills in the official Real Book, it goes on and on....
Grahame Alexander Bell did not actually invent the telephone, nope, he stole the invention:
https://www.theguardian.com/world/2002/jun/17/humanities.internationaleducationnews
... in the world of Art Marcel Duchamp's very famous urinal was very probably not created by him at all but by a little known female artist:
https://www.huffingtonpost.com/jane-chafin/duchamps-urinal_b_1472735.html
...
Are you saying that Hanz Z does all the work the writing, composition, sound design, are you saying some one can come along and take that compersition and get all the credit, the money, and the fame for something that they scammed from Hanz,