"Chain of custody" sounds like something from a crime drama, but the idea is simple: be able to show what happened to a piece of evidence from the moment it was created until the moment someone relies on it. For security footage, that means being able to say which camera recorded it, when you exported it, who handled it, where it has been stored and that it has not been changed. You do not need laboratory equipment. A handful of habits, written down, can make your footage far more credible to police, insurers, attorneys and, if it comes to that, a court. This guide explains those habits in plain language for homeowners and small-business owners in New York and New Jersey.
This is general information, not legal advice. Standards for evidence vary by situation. If footage may be used in a legal proceeding, ask your attorney how to handle it.
1. The Short Version
| Step | Habit |
|---|---|
| Preserve | Save the clip before it is overwritten. |
| Export | Use the recorder's export function, in the original format. |
| Label | Date, camera, time range, exporter. |
| Protect | Keep the original untouched. Work from copies. |
| Verify | Record a checksum (hash) if you can. |
| Store | Secure media, two copies. |
| Log | Write down every handoff. |
2. Why It Matters
Footage becomes more useful when people trust it. A clip that arrives from a phone recording of a monitor, with no date, from an unknown camera, is easy to question. A clip exported from the recorder with a log showing who exported it, when, from which camera and where it was stored is harder to dismiss. Good habits also protect you. If you are asked to prove you did not alter footage, or if someone claims it was edited, your records are your answer.
3. Preserve First
Recorders overwrite the oldest video when the drive is full, so the first step after an incident is to save the footage. Export it now, even before you know who will want it. Note the date and time of the incident and the time you exported. If your recorder has a function to lock clips from overwriting, use it. If you have a cloud copy, note that too. Our guide on camera footage retention policies explains how to build holds into your routine.
4. Export the Right Way
- Use the recorder or software's export function. Do not film the screen with a phone, except as a last resort, and if you must, say so in your notes.
- Export in the native format and include the viewer or player if the system provides one.
- Also export a standard format such as MP4, if available, for easy viewing.
- Include a margin of several minutes before and after the event.
- Export from every relevant camera, not only the obvious one.
- Take screenshots of the camera list and time settings if helpful.
Different systems behave differently, so ask your installer to show you the process once and write it down.
5. Check the Clock
The date and time stamp is often the most important detail. A recorder clock that is five minutes off can confuse a timeline. Compare the recorder's time to your phone or an online time source and note the difference on the day of export. For example: "Recorder clock was 2 minutes fast at 3:10 p.m. on October 20." Keep the recorder synchronized to a time server if your system supports it. Our guides on time sync and on timestamp accuracy explain how.
6. Label Everything
Use a consistent naming pattern: date, camera name, start and end time, and your initials. For instance, 2026-10-20_FrontDoor_2305-2335_TM. Put the same information on the drive's label or in the folder name. If you export multiple cameras, keep them in one folder with a text file describing each one. Avoid vague names such as "video1" or "clip final."
7. Keep the Original Untouched
Treat the first export as the original. Never trim, filter, brighten, caption or convert it. If someone needs a shorter or enhanced version, make a copy and label it as a copy. Keep the original on separate media and do not open it more than necessary. If you must redact faces for privacy, do so on a copy and say so.
8. Hash the File If You Can
A hash, also called a checksum, is a short string computed from a file's contents. If the file changes by a single bit, the hash changes. Record the hash when you export. Anyone can later recompute it to show the file is the same. Many computers have built-in tools for this, and your installer or IT person can do it in a minute. If you are not comfortable, ask for help. It is not essential for every clip, but for anything that may matter in a dispute, it is a strong, inexpensive habit. Our guide on video watermarks and authentication explains related features some recorders offer.
9. Store Securely
Keep exported clips on two separate devices, such as an encrypted USB drive and a locked folder on a computer, both protected by passwords. Do not leave them on a shared drive that anyone can open or in a text thread. Keep the recorder itself in a locked space. New York's SHIELD Act, General Business Law section 899-bb, requires businesses that own or license computerized data including private information of New York residents to maintain reasonable safeguards, with a scaled standard for small businesses; see nysenate.gov. Our guide on protecting footage as business data covers the broader habits.
10. The Log
Create a simple log, on paper or in a spreadsheet, with a line for every handoff: date and time, what was exported, from which cameras and time range, who exported it, hash value if used, where the files are stored, who received a copy, how it was delivered and any notes about clock offsets or conditions. Have the person who receives the footage sign or confirm by email. Keep the log with the footage. It takes a minute per entry and may be the difference between footage that is shrugged off and footage that is relied upon.
11. Handing Over Footage
When police, insurers or attorneys ask for footage, give copies, not originals, unless told otherwise. Use a clean drive or a secure link with an expiry. Ask for a receipt or email confirmation. Do not give out your recorder password. Our guides on giving footage to the NYPD and on lawyer and insurer requests explain how to verify a requester and what to share.
12. News Context
Footage gets used in real cases. In February 2026, NYPD released stills and video from a Staten Island doorstep to help identify three young men who tried to enter three homes overnight, according to CBS News New York. In July 2026, QNS reported on a burglar targeting homes in Flushing, Oakland Gardens and Bayside, with a $3,500 reward offered. When police build a case from private cameras, the more carefully the footage was handled, the more useful it is.
NYPD reported burglary down 19.5% citywide in May 2026 compared with May 2025 (NYPD).
13. Costs
These habits cost almost nothing. Planning ranges in 2026 for supporting equipment and services: a recorder upgrade with easier exports and audit logs, $800 to $3,500; a system health check including clock correction, $150 to $450; an encrypted external drive, $60 to $200; a four-camera home system installed, $1,600 to $3,600; a small business system with four to eight cameras, $1,800 to $6,800. These are planning ranges, not quotes.
14. Questions to Ask Your Installer
- Can you show me how to export a clip with a viewer and a standard copy?
- Can the recorder lock clips so they are not overwritten?
- How do I compare the recorder clock to a real time source?
- Does the system keep an audit log of exports and logins?
- Can you show me how to generate a checksum?
- Can you write a one-page export procedure for my system?
See our local pages for commercial camera installation in Brooklyn, security camera installation in Nassau County, commercial installation in the Bronx and our services page.
Want a system that exports cleanly? Revolvis will walk the property with you and mark the spots.
15. A One-Page Template
Title a page "Footage Export Record." Add fields: Incident date and time; Reason for export; Exported by; Export date and time; Cameras and time ranges; Recorder clock offset; File names; Hash values; Storage locations (primary and backup); Copies provided to (name, date, method); Notes. Print a stack and keep them next to the recorder. Fill one out every time footage leaves your system. Over time it becomes a habit, and when it matters it will already be done.
More From Revolvis
Cameras are one layer of a secure property. The same in-house crew also handles the rest:
- Keyless entry installation and smart lock installation
- Access control systems and commercial access control
- Video doorbells and intercoms
- Alarm system installation
- Complete unified security
Learn more about Revolvis, meet the team, see all services, browse the blog or contact us.
Areas We Serve
Revolvis installs residential and commercial camera systems across the New York metro area. Every borough and county has its own building stock, rules and wiring challenges, so the plan for a Queens two-family is not the plan for a Manhattan co-op.
- Staten Island: houses, detached garages and shop fronts. See security camera installation in Staten Island.
- Brooklyn: brownstones, row houses and storefronts. See security camera installation in Brooklyn.
- Queens: attached brick homes, two-families and busy commercial strips. See security camera installation in Queens.
- The Bronx: pre-war buildings, bodegas and warehouses. See security camera installation in the Bronx.
- Manhattan: co-ops, condos, offices and retail. See security camera installation in Manhattan.
- Long Island: Nassau County and Suffolk County.
- New Jersey: Jersey City, Newark, Hoboken and nearby towns.
The full list is on the service areas page.
Get a Custom Quote After a Site Visit
Revolvis prices every job after a site visit, because the building sets the cost as much as the equipment does. A few things make the estimate faster and more accurate:
- The address and property type: house, apartment, co-op, condo, storefront or warehouse.
- Which doors, sides and areas you want covered, and what worries you most.
- Photos of those spots and any spots where you already have cabling or power.
- How many days of footage you want to keep and whether you want to watch on your phone.
- Any landlord, board, lender or insurer requirement.
Call 347-258-9165 or use the contact page to book a site visit. The quote you receive is written and itemized, so you can compare it line by line.
Frequently Asked Questions
What is chain of custody for camera footage? A record showing what happened to a clip from recording to export to handoff, so people can trust it.
Should I record my screen with my phone? Only as a last resort. Use the recorder's export function.
What is a hash? A short code computed from a file. If the file changes, the code changes, so it can show the file is unaltered.
Should I edit the original clip? No. Keep the original untouched and make labeled copies if changes are needed.
How should I store exported clips? On at least two secured devices, with passwords, away from the recorder.
Do I need a log? Yes. A simple record of each export and handoff is worth the minute it takes.
Ready for a custom quote? Call Revolvis at 347-258-9165 for a site visit and a written, itemized estimate.
Safety note: A camera system supports, but does not replace, good locks, lighting, alarms and everyday habits. If you are in danger or witnessing a crime, call 911. Prices and legal summaries in this guide are general information for the New York metro area, not an offer or legal advice. A written quote after a site visit governs your actual price, and for legal questions you should confirm with the agencies linked in the article or a licensed attorney.