insert specific html in footer

Hello, I want to insert a copyright notice in the footer on every page of my music blog. It should be next to the back to top button and the last element on the page. Can I target that area with your plugin? For example:

here is the html code:

</div>
<!-- .footer-widgets -->
<div class="site-footer-bottom clearfix">
	<div class="site-info pull-left">
		<a></a>
	</div>
	<!-- .site-info -->
	<div class="gotop-link pull-right">
		<button id="gotop" class="clean-button" type="button">Back to top</button>
	</div>
	<!-- .pull-right -->
</div>
<!-- .site-footer-bottom -->

here is the notice I want to display
Copyright © 2017-2019 Nicolas Sursock | SIRIUS STUFF

Many thanks for your wonderful plugin.
Nicolas

Bonus: I would like the 2nd date to be dynamic 🙂

The page I need help with: [log in to see the link]