If I were you, I'd try and find something that is Creative Commons, CC0 is best (the most permissive CC license). And then you can say in your disclaimer that the audio is CC licensed, which is ideal.
If only copyright were actually that simple. The music might be, and the performance not, or vice versa. Maybe the rights were assumed to be public domain, and then a company discovers the rights in their vault. Maybe the license is permissive, but one of the many people involved never agreed to it, and that means that it retroactively isn't licensed permissively.
All of the above have happened before.
Using language that makes one amenable to takedown requests might be fine. But it’s no defense for infringing on others’ copyrights by posting their IP without a license.
OP, take parent comment’s advice and find some appropriately licensed music.