That statement isn’t true, copyright doesn’t work that way.
However, someone was trying to claim they owned the copyright to that song and finally in 2015 someone refused to settle with them when they sued. They went through the full court battle and the courts decided that person did not own the copyright to that song.
I don’t remember enough of the details of their claim to explain their reasoning, but the claim was good enough (and court battles are expensive enough) that everyone would just settle.
Anyway, copyright doesn’t work that way, you can sing any damn song you want.
Splitting helium requires energy. Go for Radon or something.