Earlier quoted context omitted.
Since establishing provenance is such a big problem for Google, perhaps it might be a good idea for Google to offer a time-stamping service itself?
Google offers this service already: http://www.labnol.org/internet/fat-pings-for-content-scraper... https://en.wikipedia.org/wiki/PubSubHubbub https://pubsubhubbub.appspot.com/ Most of the big hosted publishing platforms like WordPress and Blogger already use it, but it's pretty common for sites that built their own codebase not to. (This was one of my interests at Google, and I had both a 20% project [unreleased] an…
What if your blog doesn't use Pubsubhubbub, but mine does, and I copy your blog post? Google will see my post first, but that doesn't prove I wrote it, so Google cannot use that to make ranking decisions.