Except that Gulf+Western no longer exists. It was renamed Paramount Communications in the mid-80s [around the time of Paramount's 75th Anniversary celebrations] and is now a unit of Paramount Global.
Given that Paramount holds worldwide rights, one would presume they also hold the OCN.
I have my doubts that the previous scan was done at 4K.
Criterion is pretty good at revealing the provenance of their masters in the liner notes.
We won't know until Criterion releases further information.