Italian writer Mario Biondi offers
to Opera Lovers his
Database of Recorded Opera

In this service you will find DATA about around 750 composers
and 2200 titles of operas in more than 7000 recordings.
Here you can proceed to complex searches, such as (simple example) recordings of Maria Callas in 1960,
of Netrebko (with) Villazon (on) DVD and so on,
simply writing those data in the "Search" field:
Callas 1960
or Netrebko Villazon dvd and so on.
If on the left of the rows you see a +, it means that clicking on it you can access to more data not allowed by a small display (in particular mobile devices).
Just check it out…

VOTES ARE NOT by me, but taken from specialised sources.
If the field “Rating” is empty, it means that I did not find any relevant data