We recently changed hosting companies for our ecommerce website. The hosting company added some functionality such that duplicate content and/or mirrored pages appear in the search engines.
To fix this problem, the hosting company created both canonical URLs and URL rewrites. Now, we have page A (which is the original page with all the link juice) and page B (which is the new page with no link juice or SEO value). Both pages have the same content, with different URLs.
I understand that a canonical URL is the way to tell the search engines which page is the preferred page in cases of duplicate content and mirrored pages. I also understand that canonical URLs tell the search engine that page B is a copy of page A, but page A is the preferred page to index.
The problem we now face is that the hosting company made page A a copy of page B, rather than the other way around. But page A is the original page with the seo value and link juice, while page B is the new page with no value. As a result, the search engines are now prioritizing the newly created page over the original one.
I believe the solution is to reverse this and make it so that page B (the new page) is a copy of page A (the original page). Now, I would simply need to put the original URL as the canonical URL for the duplicate pages. The problem is, with all the rewrites and changes in functionality, I no longer know which URLs have the backlinks that are creating this SEO value.
I figure if I can find the back links to the original page, then I can find out the original web address of the original pages.
My question is, how can I search for back links on the web in such a way that I can figure out the URL that all of these back links are pointing to in order to make that URL the canonical URL for all the new, duplicate pages.
