Based on the amazing Job by <a title="Nathan's Homepage" href="http://yergler.net/" rel="nofollow ugc">Nathan R. Yergler</a> and his <a href="http://wiki.creativecommons.org/WpLicense" rel="nofollow ugc">WP-Licencse Plugin</a>. This plugin Alows users to assign a Creative Commons license to content on a per post basis (or no license at all)
This plugin was made possible thanks to <a href="http://www.socialbrite.org" rel="nofollow ugc">SocialBrite</a>
The license chunk on the posts is wrapped in a DIV with class: wp_license

WP License reloaded

Per post Creative Commons Licensing (Ideal for multiple authours / licenses blogs)

Jb Audras

Google Images now supports “license” Schema.org Structured Data.
It’s useful for website owners, as they can use those structured data to show the preferred Licensing Policy for the images used on their website. They can also use this plugin to appear on top of the Google Image search tool for specific license filtered searches.
This plugin provides Licensing for your website images, using Schema.org structured data for Google Images. And even if your images are not free to use, it’s always interesting to appear on Google Images, with the right license and a nice link to your website Image license policy page (which is most of the time your Legal Notice page).
For more information, see the related resources:
<ul>
<li><a href="https://support.google.com/webmasters/thread/31516792" rel="nofollow ugc">Google Search Console FAQ about Image licensing structured data</a></li>
<li><a href="https://developers.google.com/search/docs/data-types/image-license-metadata" rel="nofollow ugc">Google Structured Data Documentation</a></li>
</ul>
<h3>Current implementation and roadmap/next steps</h3>
For the moment, this plugin supports all the Creative Commons licenses. Plus, you can select your very own license policy (requires a custom licensing policy page).
The plugin also builds a specific image policy link that will be displayed on Google Image. So if they want to use your image, people will be asked to give you proper credits, according to your licensing policy.
Next steps:
<ul>
<li>Support more licenses: feel free to ask for specific licenses in the <a href="https://wordpress.org/support/plugin/image-licensing-schema/" rel="ugc">support forum</a>!</li>
<li>Provide a Licensing Policy Page builder, just like WordPress Core does with the Privacy Policy page.</li>
</ul>

Image Licensing Schema – Structured Data for Google Images

Provide proper Licensing for your images, using Schema.org structured data for Google Images.

WP License reloaded vs Image Licensing Schema – Structured Data for Google Images