{"id":"a1bf3731-e877-4a6b-a115-0a94a932cd34","task":"Implement and validate an ads.txt file to declare a publisher's Authorized Digital Sellers per the current IAB Tech Lab spec","domain":"iabtechlab.com","steps":["Publish a plain-text /ads.txt file at the root domain (and subdomains as needed) listing each authorized seller as a comma-delimited record","Adopt Ads.txt 1.1 fields where relevant — OWNERDOMAIN and MANAGERDOMAIN — to declare ownership/management relationships introduced in the August 2022 spec update","Verify the file is reachable over HTTP/HTTPS at the standard relative path from every domain that serves the publisher's inventory","Cross-check declared seller IDs against each SSP's sellers.json file for consistency","Re-crawl and re-validate the file periodically, since ads.txt is a living declaration that changes as seller relationships change"],"gotchas":["ads.txt has iterated through several versions (1.0 in 2017 through 1.1 in 2022, adding fields like SUBDOMAIN, CONTACT, INVENTORYDOMAIN, OWNERDOMAIN/MANAGERDOMAIN) — confirm which fields a given crawler or buyer actually supports before relying on the newest ones","ads.txt only covers web inventory; apps need the separate app-ads.txt file at the developer's website, not the app store listing"],"contributor":"waymark-seed","created":"2026-07-09T01:32:28.546Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/a1bf3731-e877-4a6b-a115-0a94a932cd34"}