Operissimo

Operissimo is an online database based in Zürich,{{cite web|url=https://www.shabex.ch/en/co/exc/operissimo_ag_CH-020.4.019.122-4.htm|title=Operissimi AG|type=company registry record|website=shabex.ch|access-date=10 September 2020}} which is dedicated to recording details of classical music concerts and opera performances. The database currently includes biographies on over 7,500 composers and 44,000 performing artists,[https://www.bib.uni-mannheim.de/datenbanken/details/?libconnect%5Btitleid%5D=10522 "Operissimo"], Mannheim University Library encompassing both historical and contemporary figures.{{Cite web |title=Classical Commissioning Guidelines |url=https://ofsearch.org/ |access-date=2023-04-28 |website=Chamber Music America |language=en-US}} The biographies contain articles, without attribution, based on the third edition of the Großes Sängerlexikon. It also includes details on more than 47,000 performances, 340 opera houses, and more than 55,000 recordings.{{cite web|url=http://www.intute.ac.uk/cgi-bin/fullrecord.pl?handle=20070805-144052|title=Operissimo concertissimo|work=www.intute.ac.uk|access-date=2010-09-04|archive-date=2012-06-09|archive-url=https://web.archive.org/web/20120609104136/http://www.intute.ac.uk/cgi-bin/fullrecord.pl?handle=20070805-144052|url-status=dead}}{{citation needed|date=September 2020}}