Although the copyright notice displays a default one for Styled Themes, you can change it to your own, but only for the front-end of your website. Any reference in the source code of any theme file must stay intact. Right now the notice looks like this in the footer of your pages:
Changing the Copyright Notice
- Go to Appearance >> Themes >> click on the text link “Customize“
- Click on the tab labeled as “Basic Settings“
- In the copyright field, remove the reference to Styled Themes and then enter your own in.
- Click Save & Publish
NOTE: I would recommend not putting in html code into this field, such as links. You do not need a linked copyright to the site it’s on.