Evidence should prove the substance of access, not just the existence of a policy. Keep the business-user request, authorisation documents for third parties, data-category mapping, consent handling for personal data, delivery method, error logs, denials, partial responses, and follow-up communications.
The DMA compliance-report template points to a broader evidence package: measures implemented, changes to business-user terms, consultations, actions to inform business users, security or privacy measures, testing, indicators, underlying data, and monitoring systems. For Article 6(10), those records should connect the legal scope to the actual access mechanism and to measurable outcomes such as request counts, fulfilled requests, rejected requests, latency, completeness, and data-quality issues.