I have a question and I’m hoping someone might know the answer.

Jen, there's no chance this is protected by copyright, it's well outside any time restrictions and since it's regarded as traditional there's nobody to pay for it anyway

I know it's been around for as long as my grandparents can remember, since they taught it to me as a song from their childhood, so that's like forever... actually I believe it's from around the time of the Reformation in England, making fun of the Catholic rituals.  To be fair, the Pope does wear a silly hat.