Watermark

[Rihanna]

A mark indicating the height to which water has risen,
or at which it has stood; the usual limit of high or low water.

[Britney]

See [ebaums world] and look at all of the stolen images - that Ebaumsworld black box at the bottom right is eBaums watermark, which he uses to attempt to show ownership over stolen material.

[Gregory]

A label put on videos and photos that show ownership over that material. Can be found all over the internet, most commonly on YouTube videos made by Bandicam.com, in which the www.bandicam.com label is displayed on the screen.

[Justin Bieber]

A faint design made in some paper during manufacture that is visible when held against the light and typically identifies the maker.