Schema markup for NAP?

We've been deep-diving into NAP consistency, using various citation tools as discussed in the previous thread, and while these tools help with basic submissions, we're still encountering subtle inconsistencies in how search engines like Google interpret our business information, especially for multi-location clients. It feels like there's a disconnect between what we push out via citations and what Google ultimately displays, suggesting a deeper technical integration or data interpretation issue, and we strongly suspect this is where structured data comes into play. Our current focus is on optimizing our on-site Schema markup for NAP. We are diligently using LocalBusiness and Organization schemas, ensuring name, address, and telephone properties are correctly nested and aligned within our JSON-LD implementation. However, we're really struggling to ascertain if our Schema markup implementation is genuinely the definitive source for Google, or if it's still heavily weighed against potentially inconsistent external citations from aggregators. What are the most robust Schema markup strategies for ensuring NAP consistency, particularly for SaaS platforms managing numerous client locations? Are there specific properties or nesting hierarchies within LocalBusiness or Organization schemas that Google favors for NAP to prevent any ambiguity? We're keen to understand how we can effectively use Schema markup to 'correct' or 'reinforce' NAP data when inconsistencies might exist in third-party aggregators, essentially making our site the authoritative source. Are there any advanced techniques for dynamic Schema markup generation for multi-location businesses, ensuring each location's NAP is perfectly represented without manual errors? And critically, are there any specific Schema markup validators or debugging tools that are particularly strong at identifying NAP inconsistencies within the structured data itself, beyond just basic syntax checks? We're looking for expert insights into making our Schema markup the ultimate source of truth for NAP, minimizing external data noise. Waiting for an expert reply.