Do you know if the metadata is available via a free, open resource? For others, here are some very interesting looking links I just found:
* https://kb.ddex.net/display/HBK/Technical+Description+of+RIN
Recording Information Notification (RIN) standard, used by DDEX. See the samples at the bottom for a good sense of it.
* https://jaxsta.com/
Jaxsta is said to aggregate DDEX metadata, but I'm not sure what exactly that means or if it's publicly available.
* https://www.sound.credit/
Sound Credit calls itself "The Next Generation of Credits, Liner Notes, and Album Art" and seems marketed toward industry, but uses the RIN standard (and DDEX metadata?). Someplace said the metadata was freely available, but I don't see it in a brief look.