A construction defect attorney receives discovery materials for a five-year-old project. The opposing counsel submits 300 photos showing alleged water intrusion damage. The metadata timestamps span three different dates. The original contractor claims the photos were staged after litigation began. The property owner insists they document pre-existing conditions.
Who's right? Traditional digital evidence can't answer that question.
ProofLedger solves this by creating blockchain-anchored timestamps that prove when evidence existed before disputes arise. Instead of arguing over manipulable file metadata, you have immutable proof anchored to Polygon and Bitcoin networks.
Here's the concrete workflow: A claims professional photographs a loss site using any device. They upload the images to ProofLedger before leaving the scene. ProofLedger generates SHA-256 hashes of each file and anchors those hashes to the blockchain within seconds (Polygon) and daily batches (Bitcoin). The original files never leave the professional's device - only the mathematical fingerprint gets anchored.
Later, when the case goes to litigation, the professional can prove exactly when that evidence existed. The blockchain anchor is independent of the file itself. No platform can strip it, no transfer can corrupt it, no time can alter it.
Courts can authenticate blockchain records under FRE 901(b)(9), which allows authentication of evidence produced by a process that generates an accurate result. The key is laying proper foundation through expert testimony about how blockchain networks operate. FRE 902(13) enables self-authentication of machine-generated records through written certification, eliminating the need for live testimony in many cases.
The dual-chain approach strengthens admissibility arguments. Polygon provides instant anchoring with immediate verification. Bitcoin adds proof-of-work consensus backed by massive computational investment. An attacker would need to control 51% of Bitcoin's global mining network to alter historical records - a cost measured in billions of dollars.
This matters because evidence timing often determines case outcomes. In construction defect claims, proving that damage photos predate the contractor's final inspection can shift liability entirely. In insurance disputes, demonstrating that loss documentation occurred before the policy lapse date affects coverage decisions. In forensic investigations, establishing that digital evidence existed before a subject became aware of the investigation preserves its probative value.
The difference between "this photo was taken yesterday" and "this photo existed before the loss date" can determine million-dollar settlements.
Traditional notarization requires scheduling, travel, and per-document fees. Blockchain anchoring happens instantly at the point of evidence collection. A claims adjuster documents a scene once. The timestamp proof exists permanently.
Evidence packs organize related files by case, claim, or matter number. Each pack includes loss dates and pre/post indicators, making it clear which evidence predates the incident under investigation.
The strongest chain of custody combines both approaches: comprehensive documentation of what happened (photos, reports, witness statements) plus immutable proof of when that documentation occurred (blockchain anchors).
Anchor before the loss, not after. Risk documentation, not claim documentation.