Adsense question about content

I plan to make new website in some niche and make my own posts and content which would be unique.

After some time when site generate stable traffic I will apply for Adsense since I don't have it, and of course I hope, because of unique content, that it will be accepted.

My question is:
If, for example, some time pass in generate traffic, making backlinks etc. month, two, three and someone else copy some content from my website, when I apply for Adsense they could tell that I have copied content on my website even I was make it with myself, because they shows on some other websites. Or that procedure is different of what i have on my mind.

I appologize if this is noob question. Thank you.

No way, you are too much overthinking. Why not just post your content when it's fully ready?

I think it's easy for google to see what website post the content first.

Dude seriously don't over think it. The first time i applied for adsense my site had 3 posts and was up for 2 months. They approved it within a week or so. Just create your site add content. When your getting some traffic apply. If your worried about content being copied don't unless your the one copying it! You have index dates and all sorts of crap taken into consideration.

What you need to ask yourself is "is my site worthy of adsense" i.e is it great content and a good niche. Google won't approve a tech site if they do your doing something amazing. So get thinking about that.