From Jensense, several new changes in Adsense Policies, one of them specifically prohibiting display of Adsense ads on copyrighted materials:
Website publishers may not display Google ads on web pages with content protected by copyright law unless they have the necessary legal rights to display that content. Please see our DMCA policy for more information.
I can see a lot of sites or blogs which could be affected by this. Here are some I can think on top of my head:
- Celebrity or showbiz blogs using videos captured from TV, cable or movies.
- Photo blogs displaying pictures of celebrities, models and actors/actresses.
- Lyrics sites or blogs.
- Blogs or sites providing streaming songs or mp3 downloads of recording artists.
- Blog aggregators or portal. Unless you have explicit permission from bloggers to aggregate their content, they could report you for DMCA and asked to have your account voided.
Anyone can just report the site/blog for DMCA violation and your Adsense could be banned. If you are unsure, it would be good to seek advise from Adsense Support Team.


Thanks for pushing out more ad-supported music information to the World!
Sincerely,
The Songnumbers Team
(PS, we just launched BETA 2 of our site!)