We had a custom CMS with URLs such as
/beastie-boys but now they have the structure
/artist/beastie-boys (a custom post type)
Obviously when people visit the original links, they get a 404. Is there a way/what's the best way to check whether whether the post exists in the new format first before throwing out a 404 error? There's 80k or so artists in the database.
We're on IIS so could make use of a
rewritemap but it'll probably be too massive