I have the following custom tag configured in "AppData\CustomTagConfig.xml":
<Tag id="BruceBaseEventURL" id3v23="TXXX/BRUCEBASE EVENT URL" id3v24="TXXX/BRUCEBASE EVENT URL" wma="BruceBaseEventURL" vorbisComments="BruceBaseEventURL" mpeg="BruceBaseEventURL" ape2="BruceBaseEventURL" />
Custom Tag: BruceBase Event URL
Save to musicfile as: BruceBaseEventURL
The values have the following structure: "1977#070277"
When using them in the "custom web link section" as
http://brucebase.wikidot.com/<BruceBase Event URL>
I get the following in the browser when clicking them (the "#" gets translated to a "-", resulting in a page not found error)
http://brucebase.wikidot.com/1977-070277