How to handle url relationships on doujin music

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I found a Choucho CD from before her major debut, and it was sold only at M3 in 2011.
I was wondering if her blog post announcing the release of her first original album would count as a discography entry for the release?
Her homepages from after her major debut don’t mention her previous self published releases. The same question applies for the rest of her self published releases.