Bridbog is the generic name for Brid's ads.txt crawler. If your website is included in Brid's ad program, your ads.txt file may get crawled by Bridbot. Its sole purpose is to check whether the appropriate ads.txt entries are input into your ads.txt file and nothing else.
How Bridbot accesses your ads.txt file
In most cases, you won't see more than 1 access per day.
The best way to verify that a request actually comes from Googlebot is to use a reverse DNS lookup on the source IP of the request and make sure that it returns brid.tv as the domain.
Bridbot technical specs
Full User-Agent String
Mozilla/5.0 (compatible; Bridbot/1.0; +https://brid.zendesk.com/hc/en-us/articles/360010743959)
Bridbot Example in Robots.txt
This specific example will disallow crawling of your ads.txt file with Bridbot.
User-agent: Bridbot Disallow: /ads.txt