The Video Exists. Proving When It Was Captured Is a Different Problem.
A claimant has doorbell footage of property damage. Clear video. Good angle. Timestamp in the corner reads 11:47 PM on the date of the event.
The opposing party doesn't challenge the footage. They challenge the timestamp. The camera clock was never synced to a reliable time source. The footage was transferred from the device to a laptop, which reset the file metadata. Opposing counsel makes a simple argument: the video exists, but there's no verifiable record of when it was captured.
That's where claims collapse.
Camera Timestamps Aren't Evidence of Timing
Security cameras, doorbells, dashcams, and bodycams all generate timestamps. Most can't be authenticated as accurate.
Consumer devices don't sync to NTP servers by default. Camera clocks drift. Firmware updates reset them. A doorbell that lost power during a previous outage may have its internal clock off by hours. A dashcam with a dead CMOS battery often reverts to a default date, sometimes years in the past.
File metadata doesn't help. When video is copied from a device to external storage, file system timestamps change. When it's uploaded to cloud storage, platform processing strips or rewrites metadata. The original timestamp in the file header survives none of this reliably.
Courts recognize the problem. FRE 901(b)(9) allows authentication of evidence produced by "a process or system that produces an accurate result." The key word is accurate. A camera clock with no verifiable sync source doesn't satisfy that standard without foundation. Laying the foundation typically means expert testimony: someone who can explain the camera's timekeeping mechanism, expected clock drift, whether any sync occurred, and how the file timestamp correlates with independent time sources.
That's a retained expert, or a deposition, or both.
What FRE 902(13) and 902(14) Actually Offer
Two amendments added to the Federal Rules in 2017 provide a different path.
FRE 902(13) allows authentication of records generated by a process or system that produces an accurate result. The authentication happens through written certification, not live testimony. If the process is reliable and documented, the opposing party can challenge the certification, but that challenge goes through motion practice, not cross-examination.
FRE 902(14) covers data copied from an electronic device, authenticated by a process of digital identification. A SHA-256 hash comparison is exactly that process: a certified professional attests that the copy of the footage matches the original hash, without testifying in person for every case.
902(13) covers process reliability. 902(14) covers copy integrity. Together, they provide a certification path that removes the expert-on-the-stand requirement, which matters for litigation teams handling volume.
What a Blockchain Anchor Changes
A blockchain anchor addresses the underlying process problem that 901(b)(9) requires you to solve.
ProofLedger anchors a SHA-256 hash of any file to both Polygon and Bitcoin. The video stays on the device. Only the hash goes on-chain. A 4GB bodycam file or a 30-second doorbell clip goes through the same path: hash the bytes, anchor the hash, return a proof.
The anchor timestamp doesn't come from a camera clock. It comes from the blockchain's consensus mechanism, which is verifiable by anyone with the transaction ID. Polygon provides an instant anchor with a public explorer URL. Bitcoin, anchored daily in batch with a merkle proof, adds a second independent chain that provides additional weight in any admissibility argument.
Change one frame of the video after anchoring, and the hash changes. The blockchain record stays. That mismatch is detectable and provable. Change nothing, and anyone can verify the match: there's a public verify endpoint that returns the proof record and chain transaction for any hash, no account required.
The on-chain timestamp creates the foundation for a 901(b)(9) or 902(13) argument. The process is deterministic. The ledger is public. The anchor is permanent.
The Window That Matters
There's a narrow window where anchoring does the most work: between capture and any subsequent dispute.
Anchor at capture time and the argument is clean. The file hash existed on-chain at a specific block timestamp, before anyone had a motive to modify or fabricate anything. The proof is accessible to opposing counsel, auditors, and the court directly.
Anchor months after the loss, when timing is already being challenged, and the anchor still helps with integrity, but the pre-dispute value is gone. Timing is what the anchor proves.
Monday Morning
If your team is documenting property damage, accident scenes, or pre-loss conditions in the field, the protocol change is straightforward: anchor the file at capture time. Polygon anchoring is free. The file doesn't leave the device. Evidence Packs can organize every anchored file by claim, matter, or date, with pre-loss and post-loss indicators.
The video authenticity problem will keep growing. More consumer cameras, more dashcams, more smart home devices capturing evidence in the background. Opposing counsel is getting more sophisticated about metadata, clock drift, and file transfer artifacts.
The answer isn't better cameras. It's a timestamp that doesn't depend on a camera clock to be accurate.
Anchor before the loss, not after. Risk documentation, not claim documentation.
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Has your team had video or photo evidence challenged specifically on timing, where the footage wasn't disputed but when it was created couldn't be verified?