Abstract: A system and method for coordinating cooperative diagnosis construction, decreasing diagnostic error, reducing delays and repetition in performing tasks, and improving application of data gathering devices through structured data tracking of symptoms, diagnoses, conditions and records using encrypted, event-based blockchain ledgers distributed throughout a network of processors. Symptom and diagnosis devices are used to collect participant data. Data is encrypted and used to generate a secure chain of decentralized ledger blocks. The secure chain is stored in a network of secure processing devices. Data access is controlled by a gatekeeper. Structured data blocks are integrated, creating a comprehensive digital record that may be shared without sacrificing control. Pathology collections are generated from integrated data.