zitrusblau

This plugin can be used as a discrete but efficient tool for websites which have to make sure that copyright information for images is mandatory.
How it works: It simply blurs all uploaded images. The original only gets restored when the copyright info is set. 
The text field for the copyright info is provided as a form field in the attachment details view.
A simple but elegant solution to enforce copyright discipline among authors and editors.
This plugin is compatible with the plugin “Enhanced Media Library” (tested with version 2.4.5).

WP Copyright

Enforces copyright discipline by blurring all uploaded images as long as the associated copyright info is undefined.

Linnea Huxford

Use the shortcode [blur][/blur] to blur text.
For example: 
[blur]This text will be blurred[/blur]
Optionally, you can set the blur to be removed when the user clicks or hovers on it.
Here are the shortcode examples for that:
[blur toggle=click]This text will be blurred until it’s clicked on[/blur]
[blur toggle=hover]This text will be blurred until it’s hovered over[/blur]
Be default, the blurred text color will be black. You can specify a different color like this:
[blur color=orange]This text will be orange, even when blurred.[/blur]
[blur color=#00FF00]This text will be green, even when blurred.[/blur]

Blur Text

Blur Text with a shortcode.  Unblur with a click or hover.  Specify a blur color.

WP Copyright vs Blur Text