The process of cross-checking seller declarations across transparency files to confirm inventory actually comes from where it claims to. You compare the seller ID in the bid request against the SSP's sellers.json, then check whether that seller appears as authorized in the publisher's ads.txt. When all three match, you have a verified chain. When they don't, you have a discrepancy worth investigating. Automated tools do this at scale. Doing it manually on a sample gives you a fast read on how clean your supply actually is.
Ad tech glossary
Sellers.json Validation
Technical definition
The process of cross-referencing seller IDs across different supply chain transparency files to confirm the legitimacy of inventory sources.
The ADLINGO translation
Get the full Mega Glossary as a PDF
Nearly 200 ad tech terms, translated. Plus the ADLINGO newsletter to your inbox. Free.
Where this shows up
Guide: How Much Does Programmatic Really Cost?
Don't let fees and confusion burn a hole in your wallet. Like your morning coffee - it deserves a disproportionate amount of your time and attention.
🍿 The microwave popcorn of media
Bragging about agency programmatic capabilities is a flex as strong as bragging about how good you are at microwave popcorn.
