Systems and methods for maintaining chain of custody for assets offloaded from a portable electronic device

A method for maintaining chain of custody for assets offloaded from a portable electronic device, the method comprising:

• receiving, by an electronic processor external to the portable electronic device, via a network interface coupled to the electronic processor, from the portable electronic device, an asset manifest including at least one asset identifier, at least one fixed-length unique identifier associated with the at least one asset identifier, and a manifest digital signature;
• transmitting, by the electronic processor via the network interface, to the portable electronic device, storage message based on the asset manifest, the storage message identifying a data warehouse;
• receiving, by the electronic processor via the network interface, from the portable electronic device, an upload completion message;
• retrieving, by the electronic processor via the network interface, at least one asset file from data warehouse;
• determining, by the electronic processor, for the at least one asset file, at least one asset file fixed-length unique identifier;
• determining, by the electronic processor, whether the at least one fixed-length unique identifier matches the at least one asset file fixed-length unique identifier, wherein the at least one fixed-length unique identifier is a hash of the at least one asset file;
• determining, by the electronic processor, whether the manifest digital signature is valid;
• and
• transmitting, by the electronic processor via the network interface, an asset deletion permission message when the at least one fixed-length unique identifier matches the at least one asset file fixed-length unique identifier, and the manifest digital signature is valid.