I can see this would be confuddling. Unfortunately the two hyphens used on Musicbrainz (Unicode HYPHEN and HYPHEN-MINUS) are supposed to look identical
ASCII originally used some code points for multiple purposes. The most well-known cases are the " and ' (“typewriter quotation mark” and “typewriter apostrophe”), but - was also used both for the regular hyphen, various dashes and the minus sign.
Unicode “unsplit” those by making separate “”″ ‘’′code points and a number of dashes, too. It also introduced U+2010 as an unambiguous way to designate a hyphen (whereas a- could be a legacy minus sign or dash). However, unlike the quotation/prime marks, and unlike the dashes, the hyphen and the hyphen-minus look identical, so interest in actually using U+2010 has remained rather low.
