https://admeasurementweekly.com/posts/openap-nine-tv-publishers-cross-publisher-capi-outcomes-measurement Ad Measurement Weekly en 2026-05-19T00:00:00.000Z Nine TV Publishers Unite Behind OpenAP to Build the First Cross-Publisher Conversion API for Television OpenAP, CAPI, CTV, Outcomes Measurement, Upfronts, Cross-Platform