Read this technical white paper and learn about ProofSpace’s patented technology, ProofMark, for demonstrating the integrity of electronic content and business records. 

This paper details the processes by which ProofMark tags electronic records with a self-validating cryptographic seal that acts as a "tamper indicator" based on a true and provable time-reference datum.  With this it is able to provide instantaneous and irrefutable proof of authenticity, no matter where the data resides or who has controlled it.