I'm sure you will be able to find somewhere you can challenge this. I had this same thing with a track I wrote, played and recorded myself, so no copyright for anyone. I have also had it on other videos I've posted and challenged the claim. Within seconds I have had an email saying the claim has been withdrawn. I think it is YouTube's cheeky way of putting ads in front of videos in the hope that most will not challenge it. Try the challenge and see what happens.