Search engines may select a canonical different from the page a reviewer opened, especially when similar copies or redirects exist.
Compare declared and selected canonicals
A page can declare one preferred URL while a search system selects another based on broader signals.
Record both when available and avoid treating either selection as an endorsement.
Look for duplicate content patterns
Near-identical pages, tracking parameters and multiple protocol or hostname versions can split indexing signals.
A consistent redirect and canonical policy helps clarify which public record is intended.
Check internal link consistency
Navigation and article links should point to the same canonical origin and URL format.
Mixed internal targets can confuse crawlers and readers about the maintained Mars Market page.
Allow for processing delay
Canonical changes may take time to appear after recrawling.
Compare the live source with the search result date before calling the difference an error.
Keep verification separate
Canonical handling improves technical clarity and duplicate control.
It does not prove who controls a claimed Mars Market destination or whether the claim is current.