Hancock Music was founded in the 1950s by John Smith and was a pioneer in the field of live music.

But now, according to a new biography, Smith and his wife, Ruth, have one the most profitable and influential recording labels in history.

The biography, by the New York Times’ Michael Sacks, details how Hancock’s success is intertwined with a story that began in the United States and then went global.

Hancock Music, a subsidiary of the family-owned Music Row Entertainment, has a global business of selling recordings to artists, bands, radio stations and independent labels, according a spokeswoman.

Its main market is China, but it has also sold to the U