zlacker

The right to citation is already part of the 1886 Berne Convention, a precedent that enables services like Google images.

The matters of the baker and the privately comissioned art are more complicated. The artist and baker hold copyrigh for their creation, but their products are also derived from copyrighted work, so Disney also has rights here [1]. This is just usually not enforced by copyright holders because who in their right mind would punish free marketing.

1: https://en.wikipedia.org/wiki/Derivative_work