Are there hidden autographs throughout the parks?
For example, at Tony’s Town Square Restaurant you can get a paw print from Lady and the Tramp.
What are others?
It would be fun if they did that same thing for Beast when he’s not around. I have never heard of another but that does not mean they don’t exist.
There are hoof prints which read “Maximus” on the ground in the Rapunzel tinkle tower area 
There are also peanut shells & elephant footprints around the Dumbo ride in Storybook Circus.
Oh - good ones!