Not sure what algorithm Deezer is using, but Benn Jordan is a fairly tech savvy musician who talks about ways to id AI generated music by looking for compression artifacts used by the training data.
It will also miss music performed by a stack of cartoon raccoons in a trench coat and music performed by God, so I don't get what point there is in mentioning other fictional characters.
https://youtu.be/QVXfcIb3OKo?si=74EdIey6RIhuwdzg