There's a difference between signing over your IP rights and giving someone a license. If I write a book and then bring it to the print shop to have it printed, I'm giving them a license, not handing over the copyright. The difference is that I'm free to (1) make further copies myself, and (2) grant licenses to others without limit.
Last year I visited the museum at Rideau Hall, the official residence of the Governor General of Canada (the representative of the Queen). They had a copy there of the royal letter formally appointing the Chief Justice of the Supreme Court of Canada.
It was set in Comic Sans.
I am completely serious.