| CPC G06Q 50/205 (2013.01) [G06F 21/54 (2013.01)] | 30 Claims |

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1. A system comprising:
at least one hardware processor; and
at least one memory storing instructions that cause the at least one hardware processor to perform operations comprising:
detecting a verification request code received from an account of a data consumer, the verification request code including a call to an external function and a query statement, the query statement comprising a result table with a task result obtained after completion of a data processing task at the account of the data consumer;
revising, at an account of a data provider, the verification request code with metadata to obtain a revised verification request code, the metadata comprising identification information of the account of the data consumer;
executing the call to the external function using the revised verification request code, the executing of the call causing an evaluation of the task result based on a comparison of the metadata and the task result; and
communicating a notification of a result of the evaluation to the account of the data consumer.
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