One of the sites I manage has a few very rare photos. These had been ranking fine since 2007 but now some content thieves are hosting these images on their server and ranking for them. More than 50% of these content thieves are hosting these images on Google owned servers - blogspot. There are other professional thieves (who are supposed to be reasonable authorities in this niche) who also host them and rank for them. These professionals have a great terms and conditions page where they claim the content to be their own copyrighted stuff.
I am working on issuing DMCA notices but there are so many thieves in this niche and it is going to take years fighting them as they crop up everyday.
However these are some things I notices.
1) The content thieves were hosting these content only from 2011 or so while it had been on my site for a much longer time frame (from 2007). Google is know to not forget anything but somehow they seem to forget this imp. information.
2) There aren't any value adds by those sites to these copied content and i only see ads everywhere on their pages. Still they rank ahead of us in google images!
So how and why is google crediting them? How can we regain ranking for our own images.
We use a frame buster script on our pages and could this be a ranking issue?