I released a new small Addon (or Module or Plugin) for SilverStripe CMS which adds a credits tab to the FileAdmin, so you can add f.e. the copyright holder of the image or any file.
Useful when you need to name credits, licence and source links for any asset used on your SilverStripe site.
https://github.com/ivoba/silverstripe-file-credits
https://packagist.org/packages/ivoba/silverstripe-file-credits
https://addons.silverstripe.org/add-ons/ivoba/silverstripe-file-credits