Rise of a copyright auto-cop
by ALEX VEIGA (Associated Press)
The Philadelphia Inquirer, publication date: 22 October 2006
"While YouTube is known as the place to find almost any kind of video clip, recent agreements with high-profile content creators require YouTube to deploy an audio-signature technology that can spot a low-quality copy of a licensed music video or other content. YouTube would have to substitute an approved version of the clip or take the material down automatically."