I'm in the USA and I just received letter that some plot summaries and character backstories are officially copyrighted!
Except I happened to notice that it says "year of completion" was 2024.
I would not be surprised if thay my my error because 2025 was a long emotional year for me. I finished everything in December of 2025 and submitted it all just after the New Year. Not to mention the recent book I was writing took place in 2024.