This isn't, sadly, the first time this has happened: Luke Fishbeck out of Lucky Dragons has had his website frozen - and his online store shuttered - because, erm, he was giving away his own music under a Creative Commons licence. He's appealing for assistance through his Facebook page:
"had my website shut down for copyright violation for sharing stuff i made myself under creative commons... lawyer friends help?"
It's not just vexing; with his legitimate store closed, it's costing Luke real money - and, you could argue, running the heavy-handed ISP up a potential claim for loss.
The host in question appears to be Bluehost.com, judging by a quick whois look-up.
[Thanks to Alex B for the tip]