There was question asking about 9x9 games. It is [here][https://boardgames.stackexchange.com/questions/22759/where-can-i-find-an-opening-database-of-professional-games-for-9x9-go]. It also contained a post script which answers your question:

[T]he following database [is ...] for [...] 19x19: http://ps.waltheri.net/

An earlier question about database for 9x9 games contains a link to a database for 19x19 games:

http://ps.waltheri.net/