I’m a firm believer in using a site that looks for copied work. Both my kids used If for all their papers. DD had to present a paper that was produced by herself and three other students. Thanks to the checker she found that one student lifted almost everything from the internet. DD’s group ended up rewriting that entire section.
The site my kids used is owned by TurnitIn. The paper will not show up as plagiarized on Turnitin when turned in the first time. The site is writecheck.com.
It also provides further proof you are the original author as you have a dated download available showing when you submitted your work to writecheck.
Good luck.