Direct quote from the page:
Please note that this site is only about US law; the copyright terms in other countries are different.[2]
On January 1, 2026, thousands of copyrighted works from 1930 enter the US public domain, along with sound recordings from 1925. They will be free for all to copy, share, and build upon
No, copyright applies specifically to the code, eulas and copyleft such as GPL rely on that fact. The logic itself can’t be, but the specific implementation can. It’s why clean room reverse engineering is fine, but a tainted decompilation direct from a binary may not be.
Ooh yeah I always forget that