Unless you publish for a company or under a contract that specifically hands over the rights to someone else, the moment you broadcast anything you created on the internet, it belongs to you.
It can be a photograph you took, a poem, a video, a story, or a drawing.
If you can prove this is your work, you won't have a problem. To avoid confusion, I provide all the links to the platforms I use and own at the end of each article.
I do that on all the platforms, so anyone can verify I am the same person. This is the only way to erase suspicions.
In your case, you should specifically mention (in your blog and on Hive) your links, so people can verify this is your work. The bot probably contains code that excludes these articles.
Plagiarism is a plague, and I support the efforts made by Hivewatchers and any individual to eradicate it.