Researchers Jose E. Puente and Carlos Puente have introduced a concept called Proof-of-Transit Timestamping (PoTT) that could enable Bitcoin transactions to Mars in as little as three minutes. The method involves transactions hopping through various stations, such as ground antennas and satellites, with each stop stamping the transaction before it reaches its destination. This concept leverages existing technologies from NASA and satellite providers like Starlink. The PoTT system acts as a "receipt layer" on Bitcoin and the Lightning Network, allowing for interplanetary transactions once a stable Earth-Mars link is established. Puente suggests that Bitcoin Lightning transfers could reach Mars in three to 22 minutes, depending on conditions. The system could also navigate around the two-week blackout period on Mars by routing through relay satellites. The concept builds on previous efforts to connect Bitcoin to outer space, such as Blockstream's satellite network and Spacechain's transaction from the International Space Station. While human presence on Mars is still pending, the researchers argue that Bitcoin could serve as a standard interplanetary currency, with PoTT providing a practical way to move value across planets.