A contractor photographs a warehouse roof on Monday. Tuesday brings a hailstorm. Wednesday, the property owner files a claim. Thursday, the adjuster arrives to inspect damage.
The contractor's photos show pre-existing conditions that complicate the claim. But how can anyone prove those photos weren't taken after the storm? The timestamp in the metadata can be changed. The camera's clock could have been wrong. Without neutral temporal authority, the photos might be dismissed.
ProofLedger solves this chain of custody problem with blockchain-anchored timestamps. When evidence is anchored to public blockchains before a loss event, it creates immutable proof that the documentation existed at a specific point in time.
Here's how the workflow changes: The contractor takes photos during routine inspection. Within minutes, ProofLedger generates SHA-256 hashes of each file and anchors them to Polygon blockchain. Your files never leave your device. Only the cryptographic fingerprint gets timestamped. A daily batch process also anchors evidence to Bitcoin with merkle proofs for additional verification.
When the claim dispute arises weeks later, you have more than photos. You have blockchain proof that those specific files existed before the loss date. The temporal verification is independent of the files themselves. Even if photos are re-uploaded, compressed, or transferred between platforms, the blockchain anchor remains intact on the public ledger.
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 rule requires laying a foundation through expert testimony or certification, but the blockchain's mathematical proof provides the reliability courts need.
For claims departments handling hundreds of disputes annually, this shifts the burden of proof. Instead of arguing about when documentation was created, you can demonstrate it. The blockchain timestamp is verifiable by any party. No proprietary systems. No trust required beyond cryptographic math.
Consider a $2M commercial property claim where timing determines coverage. Pre-existing damage photos anchored before the policy effective date become powerful evidence. The blockchain proves those conditions existed before coverage began, potentially saving the carrier from a disputed claim.
Evidence packs organize proof by case, claim, or matter. Loss dates and pre/post indicators help adjusters quickly identify what documentation existed when. The system integrates with existing workflows without requiring new hardware or software training.
The strongest documentation strategy uses both metadata and blockchain anchoring. File metadata tells you what happened to the evidence. Blockchain anchoring tells you when the evidence existed. Together, they create chain of custody that survives legal scrutiny and platform transfers.