"To our yes" is the longest officially released song, according to Guinness World Records. The song is 1 hour, 59 minutes, 54 seconds long, and was recorded by PC III label Pipe Choir. The song was not released on disc, but was released for download on Google Play and Amazon. There was also a music video on YouTube. The song was released through iTunes on 16 August 2014.
References
To our yes Wikipedia(Text) CC BY-SA