[Animats]

This came up before on YC.[1] Google does have a system to detect provenance, but you have to report your changes to Google as an RSS feed.[2] Google hasn't updated that page since 2010, and it may no longer do anything.

[1] https://news.ycombinator.com/item?id=10103545 [2] https://pubsubhubbub.appspot.com/