A method, comprising: receiving, by a data authenticity server and transmitted from a telematics device located within a vehicle (210, 310), a data stream including first vehicle performance data of the vehicle, wherein the first vehicle performance data is recorded over a first period of time; receiving, by the data authenticity server and transmitted from a mobile device (214, 314) of a user of the vehicle, second vehicle performance data of the vehicle, wherein the mobile device is located within the vehicle, and wherein the second vehicle performance data is recorded during the first period of time of the first vehicle performance data; comparing, by the data authenticity server, the first vehicle performance data and the second vehicle performance data over the first period of time; determining, by the data authenticity server, whether the second vehicle performance data corroborates the first vehicle performance data based on the comparing; comparing, by the data authenticity server, the first vehicle performance data to expected manufacturer thresholds for vehicle parts of the vehicle to determine whether one or more of the vehicle parts have been modified; responsive to determining that the first vehicle performance data does not deviate from the expected manufacturer thresholds, determining that the one or more of the vehicle parts have not been modified; and responsive to determining that the second vehicle performance data corroborates the first vehicle performance data and that the one or more of the vehicle parts have not been modified, determining, by the data authenticity server, that the first vehicle performance data is authentic. receiving, by a data authenticity server and transmitted from a telematics device located within a vehicle (210, 310), a data stream including first vehicle performance data of the vehicle, wherein the first vehicle performance data is recorded over a first period of time; receiving, by the data authenticity server and transmitted from a mobile device (214, 314) of a user of the vehicle, second vehicle performance data of the vehicle, wherein the mobile device is located within the vehicle, and wherein the second vehicle performance data is recorded during the first period of time of the first vehicle performance data; comparing, by the data authenticity server, the first vehicle performance data and the second vehicle performance data over the first period of time; determining, by the data authenticity server, whether the second vehicle performance data corroborates the first vehicle performance data based on the comparing; comparing, by the data authenticity server, the first vehicle performance data to expected manufacturer thresholds for vehicle parts of the vehicle to determine whether one or more of the vehicle parts have been modified; responsive to determining that the first vehicle performance data does not deviate from the expected manufacturer thresholds, determining that the one or more of the vehicle parts have not been modified; and responsive to determining that the second vehicle performance data corroborates the first vehicle performance data and that the one or more of the vehicle parts have not been modified, determining, by the data authenticity server, that the first vehicle performance data is authentic.