Evidence can be found on p.2 and states:

Disney’s Supply Chain Program has been designed so that the diligence aspects of the Program conform, in all material respects, to the guidance set forth in the Organisation for Economic Cooperation and Development Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas: Second Edition (OECD Guidance)

Seems to be in part structured around 4 of the steps, but no mention of step 4: "Carry out Independent Third Party Audit of Supply Chain Due Diligence at Identified Points in the Supply Chain"