Our solution lets the transporter timestamp the odometer reading and car body with photos at time of pickup, on a blockchain. When the car is dropped off, it's

Our solution lets the transporter timestamp the odometer reading and car body with photos at time of pickup, on a blockchain. When the car is dropped off, it's just a matter of comparing the blockchain record with the car's actual state. Our system lets many parties who don't know or trust each other view the same "shared state" on a public blockchain ledger (Stellar), enforcing between these parties. I have a friend with a similar use case. His company solves it by taking Polaroids, and both parties sign the backs.