It's not something we directly police, because ultimately if there's an issue with the copyright holder, it's your responsibility. I'd recommend either obtaining the rights, or recutting with similar music that's royalty-free, or something you can obtain that doesn't lose the original effect.

But at the end of the day, we just ask you to sign off on our usage of your film, based on the assumption that you're responsible for the rights of all creative elements, actors, etc. within your project. So it's your decision to make how you'd like to proceed!