How To Know If A Website Has Been Overlayed With A New Domain?

By April

YouTube video

In episode 76 of Semantic Mastery's Hump Day Hangouts, one participant asked about the ways to know if a website is overlayed by a new domain.

The exact question was:

When a site has been overlayed over a particular domain, is there a way to tell what content is on the “real” domain page and if so how (outside of possibly wayback archive)? Thanks.

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