It seems like you have confused copyright claims with copyright strikes – while a claim can lead to strikes in certain situations, receiving a claim does not mean your account has received a strike.
A claim is a link between your video and the asset (Sound Recording, Music Video, Film, Video Game, etc) which appears in the video. It allows content owners to monetize, track, block, or take down your video when it contains their copyrighted content. Quite often claims are made automatically by YouTube’s Content Identification System and do not incur a strike on your account (even when your video is blocked).
If you want to know for sure if you have received a copyright strike, log in to your account, navigate to “Videos” in your dashboard. You’ll see a list of all of your videos, which you can filter to show any copyright claims. When a video has a claim from a third party, it will have a “Copyright claim” note listed under “Restrictions.” Regular copyright claims that do not cause strikes will be shown differently, stating that your video is either still “Public” or “Blocked” under the same section.
I hope this answers your question.
