So, the author doesn't even know how to answer their own question. This whole article is a waste.
The only way Blockchain solves this issue is if every school adopts what a few are doing and applying Blockchain asset/record tracking to awarded credentials.
Now your degree is public record and verifiable through an ultra-secure search.
The ability to make this standard requires all new degrees awarded through such a system AND integrating it into older credentialing programs.
All while hoping diploma mills don’t join into it and knowing that you’ll get people from a now closed college or slow adopter flagged as lying.