Hint: BMI is a much more likely source for country music than ASCAP.    http://bmi.com/search/

There are 4 Titles
KENTUCKY WALTZ    BMI Work #799332
Songwriter/Composer        Current Affiliation        CAE/IPI #
MONROE BILL        BMI        87215859
Publishers
APRS        BMI        1156248
BILL MONROE MUSIC        BMI        75034491

KENTUCKY WALTZ    BMI Work #799333
Songwriter/Composer        Current Affiliation        CAE/IPI #
OKRUN MICHAEL        BMI        50692977
Publishers
ALPHA MUSICANA        BMI        186370157

KENTUCKY WALTZ    BMI Work #2083495
Songwriter/Composer        Current Affiliation        CAE/IPI #
FITZGERALD WILLIAM MICHAEL        BMI        186524547
Publishers
MIKE FITZGERALD PUBLISHING        BMI        186449627

KENTUCKY WALTZ    BMI Work #7109568
Songwriter/Composer        Current Affiliation        CAE/IPI #
HALEY JAMES EDWARD        NA        0
Publishers
DONE GONE PUBLISHING INC        BMI        407576841

These are the four listings at BMI. Unfortunately, neither BMI nor ASCAP gives dates of publication. I think that would make for more useful information.