A public record of Authorized Digital Sellers for a website.
https://iabtechlab.com/ads-txt/
Advertising · ads txt
Get access to data on 900,573 websites that are Ads.txt Customers. We know of 181,892 live websites using Ads.txt and an additional 718,681 sites that used Ads.txt historically and 120,204 websites in the United States.
Get a list of 900,573 websites using Ads.txt which includes location information, hosting data, contact details, 181,892 currently live websites and an additional 962,540 domains that redirect to sites in this list. 718,681 sites that used this technology previously and 120,204 websites in the United States currently using Ads.txt.