I don’t know how to do it, so I’m asking the script makers (you know who you are :-). ) to make an importer for HD Tracks. It seems to me it’d be relatively easy as all HD Tracks have a very easily accessed API. Example:
Please install it from the above page (by clicking the Raw button) and give it some testing to see if it works as expected for you (before I will submit a PR to include it in murdos’ repository where most of the other importers have their home). I have only tested the userscript without having an account there, so let me know if it behaves different for logged in users.
There were also some decisions I had to made on which I would like to hear your thoughts:
Link type: purchase for download (you can’t stream music there, can you?)
Release country: empty (definitely not worldwide, see screenshot above)
Script: Latin (I have seen nothing else, not even for K-Pop releases I had a look at)
Disambiguation: e.g. 192kHz/24bit
Annotation: (C) & (P) copyright lines, release credits (unclear to which tracks they apply)
→ both could also be copied from the page manually
As an aside, I really should document the seeding protocol for magicisrc - it actually supports an alternate parameter form like isrc2-12=XXX to set the isrc for track 12 on disc 2, if your source has the discs in the release separated.