A trail recording system includes a trail recording apparatus and a report receiving apparatus, the trail recording apparatus: holds a plurality of measurement values measured by a sensor, and trail data generated based on at least some of the plurality of measurement values; and transmits the trail data to the report receiving apparatus, the report receiving apparatus transmit, to the trail recording apparatus, a request indicating the trail data of the sensor that is an audit target, the trail recording apparatus transmits, to the report receiving apparatus, out of the plurality of measurement values, measurement values that have been used to generate the indicated trail data, the report receiving apparatus verifies, based on the trail data and the measurement values received from the trail recording apparatus, whether the at least some of the plurality of measurement values measured by the sensor are tampered is verified.