Perhaps we were too optimistic when Soundcloud teamed with Zefr last week.

Zefr is also the company YouTube uses to scan uploaded music for copyright infringement, and it can tell the difference between full songs and remixes. While we anticipated copyright holders using the system to issue more takedown notices, we assumed that it could let them claim the content as their own and start running ads on it.

While that still might be the case eventually — helping unofficial remixes and DJ mixes avoid takedown notices — that doesn’t seem to be the case today. We’re seeing reports on Twitter of increased takedown notices, and we’ve had several FACT mixes booted, as well.

More as we have it.