Generating aggregated data from fragmented inputs

A system for verifying a challenge value received from a client device, the system comprising:

• a front-end website that receives the challenge value from the client device;
• a network interface that accesses one or more external data stores to receive a plurality of data rows from the one or more external data stores, wherein the plurality of data rows are associated with a user of the client device;
• one or more processors;
• and
• one or more memory devices comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
• filtering data rows from the plurality of data rows that are not sourced from one or more computer systems associated with the challenge value;
• grouping data rows from the filtered plurality of data rows into one or more groups based at least in part on which of the one or more computer systems associated with the challenge value each of the plurality of data rows were sourced;
• determining an input velocity for each of the one or more groups;
• determining an interval value for each of the one or more groups based at least in part on the input velocity;
• calculating a group value for each of the one or more groups based on the interval value and the input velocity;
• calculating an estimated total value based at least in part on the group values for each of the one or more groups;
• determining whether the challenge value can be verified by determining whether the estimated total value is within a first threshold amount of the challenge value;
• and
• adding or removing a task from a task list managed by a workflow manager for a resource based on whether the challenge value can be verified.