YouTube just recommended me a video of Mr. Publinter himself, Luiz Fernando Magliocca, from his channel.
The video is all in Portuguese, but I will summarize it:
Mr. Magliocca discuss about the choice of Walter Murphy's 'Eyewitness News' from Valentino as the famous elections theme for Bandeirantes TV in Brazil since 1989.
Explains his background in radio broadcasting and collecting musical themes for the places he worked. Publinter was born as a side gig where he could license specialized music for TV and radio.
He describes this Valentino CD(?) packaging as the origin of 'Eyewitness News', but it's not clear if the photo it's indeed his personal set.

Then he proceeds to tell about the Valentino's label history and explains that Walter Murphy got involved with the label after the success of 'A Fifth Of Beethoven' featured in the movie 'Grease'
Eventually he became friends with Thomas Valentino 2 sons,
Thomas Joseph Valentino, here with Magliocca at Radio Bandeirantes in Brazil (unknown date):

With
Francis Valentino, probably in USA (unknow date):

The channel itself doesn't explore this production music side of his career, being more focused on his radio work and talks with seriously impressive musical guests. He seems to have direct access to anyone in Brazilian music's history, it's kinda crazy.