Unlock the boot loader on an S3 running ota 4.4.2 ? topic

Hello All,
It's been a while since I've done the work on my original S3 -
I already have cyanogen mod on my daily driver and would like to install CM11 on a new board I picked up when purchasing a new ( used ) S3 from eBay.
Can I do this ? - did the OTA lock this up ?
thanks in advance for any advice -

The replacement I bought is running a stock ROM as follows:

SCH-I535 ( Verizon )
STOCK Android Version 4.4.2 / I535OYUDNE1 / Tues 5 20 18:559 KST 2014
kernel 3.4.0 / dpi@swdd5809#1
Build Number
KOT 49H.I535VRUDNE1
SE for Android Status / Enforcing
SEP F_SCH-I535_4.4.2.0016
HDWR I535.10

PRL 15361
Device Status Official