A common error we hear about is that someone has added copyright text to an image, but the newly added text isn't appearing in their API or on their site.
If this has happened to you, here is what you need to do.
- Find and edit the document that contains the image in question
- Remove the image
- Re-add the image
- Save & publish the document
Once you've done this, you should see the copyright text appear in the API and on your site.