“Congratulations on your new collaboration!”Imagine that you are an American artist who uses sticky notes in your artistic practice.
In many countries, including the U.S. and Japan, copyright provides legal rights to authors that create works.
Moreover, in the U.S. (but not Japan), potential copyright infringers may have a legal defense called fair use.
Note that copyright law was created before the Internet, before the digital era, and before mash-up culture.
If the brand or the ad agency is willing to engage in a conversation, think about what your goals could be.