One that works:

  <mm:Album rdf:about="http://musicbrainz.org/mm-2.1/album/c3cbcaa1-ffa1-47b9-b8
15-9abebf3f1c14">
    <dc:title>Zoolook</dc:title>
    <dc:creator rdf:resource="http://musicbrainz.org/mm-2.1/artist/86e2e2ad-6d1b
-44fd-9463-b6683718a1cc"/>
    <mm:releaseType rdf:resource="http://musicbrainz.org/mm/mm-2.1#TypeAlbum"/>
    <mm:releaseStatus rdf:resource="http://musicbrainz.org/mm/mm-2.1#StatusOffic
ial"/>
    <mm:releaseDateList>
      <rdf:Seq>
        <rdf:li>
          <mm:ReleaseDate>
            <dc:date>1984</dc:date>
            <mm:country>FR</mm:country>
          </mm:ReleaseDate>
        </rdf:li>
        <rdf:li>
          <mm:ReleaseDate>
            <dc:date>1997</dc:date>
            <mm:country>FR</mm:country>
          </mm:ReleaseDate>
        </rdf:li>
      </rdf:Seq>
    </mm:releaseDateList>
    <az:Asin>B000001ZS8</az:Asin>
    <mm:trackList>

One that doesn't (no ASIN returned)

  <mm:Album rdf:about="http://musicbrainz.org/mm-2.1/album/e451737e-3c7e-4824-9b
02-21a19e75edd5">
    <dc:title>Jarre in China</dc:title>
    <dc:creator rdf:resource="http://musicbrainz.org/mm-2.1/artist/86e2e2ad-6d1b
-44fd-9463-b6683718a1cc"/>
    <mm:releaseType rdf:resource="http://musicbrainz.org/mm/mm-2.1#TypeLive"/>
    <mm:releaseStatus rdf:resource="http://musicbrainz.org/mm/mm-2.1#StatusOffic
ial"/>
    <mm:releaseDateList>
      <rdf:Seq>
        <rdf:li>
          <mm:ReleaseDate>
            <dc:date>2005-06-13</dc:date>
            <mm:country>DE</mm:country>
          </mm:ReleaseDate>
        </rdf:li>
      </rdf:Seq>
    </mm:releaseDateList>
    <mm:trackList>