Verify URL in addition to full domain (e.g. profile on any website).

It would be nice if we could verify a specific url, e.g. for any profile on any site, not just the full domain.

For me, it would work something like this: We would provide a keybase field against the profile. The verification is created as domain is now, but the result is inserted into that field. Keybase would check the html for that page and find it somewhere (in my case, e.g. hidden div "keybase", hidden until a user clicked the keybase button to display nicely).

Thanks,
Paul.

Start by reviewing the existing domain-verification flow referenced in the issue and determine how a specific profile URL would be represented and checked. No files or tests are named; done would require an agreed URL-verification design, including the HTML marker and the result field.

Written by the indexing model from the issue text.