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From the Canned Heat official biography page:

Canned Heat rose to fame because their knowledge and love of blues music was both wide and deep. Emerging in 1966, Canned Heat was founded by blues historians and record collectors Alan “Blind Owl” Wilson and Bob “The Bear” Hite. Drawing on an encyclopedic knowledge of all phases of the genre, the group specialized in updating obscure old blues recordings. Applying this bold approach, the band attained two worldwide hits, “On The Road Again” in 1968 and “Going Up The Country” in 1969. These were inspired interpretations of the late 1920s blues recordings by Floyd Jones and Henry Thomas.

Canned Heat gained international attention and secured their niche in the pages of rock ‘n roll history with their performances at the 1967 Monterey Pop Festival (along with Jimi Hendrix, Janis Joplin and The Who) and the headlining slot at the original Woodstock Festival in 1969. Alan Wilson was already renowned for his distinctive harmonica work when he accompanied veteran bluesman, Son House, on his rediscovery album, “Father of the Delta Blues.” Hite took the name Canned Heat from a 1928 recording by Tommy Johnson.