copyleft

“A popular example of a copyleft is the Creative Commons Attribution Share-Alike licenses used for works of art. This license allows work to be redistributed and reused as long as the creator is credited, and any derivatives of that work are also made available under the same type of license.

“This allows for the distribution of some digital art without payment to use it, which has become an important distinction in a chronically online world. So, if you own a copyright product and grant others the right to use it too, that’s a copyleft.”
​-Wordgenius.com

I use Creative Commons frequently for artwork and photos. You will see the citation under the thing copied.