A public record of Authorized Digital Sellers for a website.
https://iabtechlab.com/ads-txt/
Advertising · ads txt
Get access to data on 946,900 websites that are Ads.txt Customers. We know of 250,416 live websites using Ads.txt and an additional 696,484 sites that used Ads.txt historically and 171,114 websites in the United States.
Get a list of 946,900 websites using Ads.txt which includes location information, hosting data, contact details, 250,416 currently live websites and an additional 1,103,880 domains that redirect to sites in this list. 696,484 sites that used this technology previously and 171,114 websites in the United States currently using Ads.txt.