A defense attorney opens the case file. The plaintiff claims roof damage started before the policy lapse. The contractor has 47 photos timestamped "October 15th." The plaintiff's expert will testify the damage existed weeks earlier. The file metadata shows creation dates from October 15th, but file timestamps can be changed.
The court needs proof of when evidence actually existed, not when files claim they were created. ProofLedger anchors SHA-256 file hashes to Polygon and Bitcoin blockchains, creating immutable proof that evidence existed at a specific point in time. Courts can authenticate blockchain timestamps under FRE 901(b)(9) as evidence from "a process or system that produces an accurate result."
The workflow works like this: a claims professional captures photos at a loss site, drags files into ProofLedger, and receives blockchain certificates within seconds. The original files never leave the device. Only the SHA-256 hash gets anchored to two blockchains: Polygon for instant confirmation, Bitcoin for proof-of-work immutability that's operated continuously since 2009.
Three months later, when the case goes to litigation, the blockchain certificate proves those photos existed before the dispute started. The certificate shows the exact UTC timestamp, the file hash, and the blockchain transaction IDs on both networks. Any party can verify the anchor independently using public blockchain explorers.
File creation dates mean nothing in evidence disputes. A photo taken Tuesday can have its timestamp changed to show Wednesday. Email timestamps reflect server settings, not capture time. Cloud storage platforms update metadata during sync. None of these survive chain-of-custody challenges.
Blockchain anchoring works differently. The hash gets locked into an immutable public ledger. Even if someone alters the original file, the blockchain proves what existed at the anchor timestamp. The altered file produces a different hash, exposing the tampering attempt.
Risk managers understand this gap. Evidence documentation happens during normal operations, but evidence disputes surface months or years later. The timestamp that matters isn't when you stored the file or uploaded it to a platform. The timestamp that matters is when you can prove it existed in that exact state.
Construction defects, property damage, workplace incidents, product liability cases all turn on timing. Did the condition exist before the contract? Was the damage present before the coverage period? Can you prove the safety protocol was documented before the accident?
Traditional notarization costs $15-25 per document and requires in-person visits. Digital forensics experts charge $300-500 per hour and work backward from file metadata that can be manipulated. Blockchain anchoring costs under $1 per file and creates forward-looking proof that can't be altered.
The strongest evidence strategy combines immediate documentation with immutable timestamping. Capture the photos, anchor the hashes, receive the certificates. When litigation starts, the blockchain proves your evidence existed before the dispute.
Anchor before the loss, not after. Risk documentation, not claim documentation.
