For a music community, I want bands to be able to verify themselves. What is the best way to do this?

For example I could let the record label mail me, but some bands are indepedent. I could also ask them to put a 'code' on their website or Facebook page and then check manually.

I'm not per se looking for a waterproof solution, so no scanning of real life documents and I'm okay with doing the checks manually.

In other words, how can you verify real people with their virtual presence?