"Just before I put my camera away, I saw this orangutan take a taro leaf and put it on top on his head to protect himself from the rain," by photographer Andrew Suryono.
Many of the camera companies are now making cameras that can put a hash in the photo to identify it as real. Hopefully before long we start to have a way to verify this on the client side.
This has been discussed but not implemented, yet. Adobe and other software companies would also have their own hashes. It is an interesting solution, that is for sure. Time will tell if it's effective.