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SupplyChain Object (schain)
Founded 2019
Sourced & current · updated Sep 28, 2026
OpenRTB extension that records every party involved in selling a bid request.
Where they sit
Ad Fraud PreventionProgrammatic Platform
De facto industry standard for supply chain transparency in programmatic advertising, maintained by IAB Tech Lab and adopted broadly across the ecosystem
Ownership
Parent: IAB Tech Lab