"The core technical challenge was clear: How do we allow investigators to move fast while maintaining a forensic chain of custody? A simple screenshot is insufficient for legal or historical proof. We needed a system where an investigator could claim, “at this time and date, I browsed this unique URL which contained precisely this content,“ and be able to back it up with cryptographic proof."
https://dispatch.starlinglab.org/p/pilot-project-on-making-web-preservation
