Little help?

Idk if I've ever publicly stated it here but me and my friends are in our own band called Rusty Cat Records. We don't have any of our music public besides a few now privated demos but we recently finished production on our song RU There, I uploaded it to youtube to share with my friends and it's been copyright claimed and taken down even though it was a completely original song that didn't even sample anything, this has to be a violation of copyright policy right? Like I'm not losing my mind right this is a total violation of policy....RIGHT???????