The 4AM crack from 2021 mentions their version was from June, "This version is dated June 22, 1981."

    1  REM  (C) 1981 COPYRIGHT
    2  HOME :
       VTAB 12:
       PRINT "     BROKEN BY THE PIRATE 09/26/81":
       PRINT :
       HTAB 15:
       PRINT "SERIAL #98401K"
    5  A = 767:         
       B = 766:         
       C = 765:         
       D = 2048 + 4096
    4  GET A$
   10  PRINT CHR$ (4)"BLOADEPYX":
       POKE - 16299,0:
       POKE - 16304,0:
       POKE - 16297,0:
       POKE - 16302,0
   20  PRINT CHR$ (4)"BLOADTUNES":
65535  REM  SER #:98401K