A system may receive a tracking update created by a tracking device. The tracking update comprising geographic location information indicative of a current geographic location of the tracking device. The system may identify, in a blockchain, a smart contract including executable logic configured to calculate a tracking metric. The system may determine, using the executable logic, the tracking metric in response to receipt of the tracking update. The system may append a datablock to the blockchain. The datablock may include the tracking metric and the geographic location information. The system may synchronize the blockchain with a plurality of blockchains stored in blockchain databases.