DMCA Takedown — who owns code written with Copilot

I've been trying to resolve this on my own but I'm stuck.

who owns code written with Copilot. I've been dealing with this for about 14 months now and the situation isn't improving.

This involves original creative work over the past 27 months. I do not have documentation proving my ownership and timeline.

What are my legal options here? Is it worth pursuing?

Been there. Here's what I learned.

The thing that gets people is filing with the appropriate government agency. I'd recommend gathering evidence first instead.