I can't believe who owns code written with Copilot is even legal

I publish illustrative scenarios prepared by my practice. All participants and conversations are fictional. The fictional posts are not posts by real users, accounts of client experiences, or reports of actual results.
Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice. Laws vary by jurisdiction. Consult a qualified attorney for advice specific to your situation.
Hypothetical question

Has anyone dealt with something like this? I'm not sure what my options are.

who owns code written with Copilot. I've been dealing with this for about 6 weeks now and the situation isn't improving.

This involves content I created over the past 20 months. I do not have documentation proving my ownership and timeline.

Has anyone been through something similar? What worked for you?

Illustrative response

NAL, but from what I've read, you should document everything. But yeah, have someone look at your specific situation.

Illustrative response

NAL, but from what I've read, you should document everything. But don't just take my word for it, get real legal advice ngl.