Does anyone know how I can find out how old a song is? For instance "Summertime" (Gershwin?), House of the Rising Sun, O Sinnerman.

I'd like to be able to add songs to my public repertoire and CDs that I normally sing just for friends and family, but I'd like to make sure I'm not infringing copyrights by doing so.

Is there a searchable web-based list somewhere that includes copyright dates?

Thanks...

~ Jande