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You can buy a perfect proxy and still get banned — because a site recognizes you not only by IP but also by your browser's "digital fingerprint". It's a set of parameters that platforms use to link accounts even across different addresses. Let's look at what a fingerprint is, what it's made of and how to hide it so your proxy works at full strength.
What a digital fingerprint is
A fingerprint is the unique "signature" of your browser and device. A site collects dozens of parameters via JavaScript and combines them into an identifier. Even after changing your IP, you stay recognizable if the fingerprint is the same.
- User-Agent, OS and browser version
- Screen resolution and timezone
- Language and font list
- Canvas and WebGL — graphics rendering is unique to the hardware
- Audio fingerprint, plugin set, number of CPU cores
Why this matters for proxies
A proxy changes the IP but not the fingerprint. If you log into 10 accounts from 10 different IPs but from one browser — the platform sees the same fingerprint and links the accounts. That's why a proxy and an anti-detect work only as a pair.
How to check your fingerprint
Visit services like BrowserLeaks or AmIUnique — they show which parameters a site sees and how unique you are. Also check IP, DNS and WebRTC leaks: "How to Test a Proxy".
How to hide a fingerprint
| Method | What it does | Who it's for |
|---|---|---|
| Anti-detect browser | Substitutes dozens of parameters, isolates profiles | Multi-accounting, arbitrage |
| Separate devices | Real different fingerprints | A small number of accounts |
| Incognito mode | Clears cookies but does NOT change the fingerprint | Barely helps |
The working solution is an anti-detect browser (Dolphin Anty, AdsPower, Multilogin): it gives each profile its own set of parameters. Proxies for them are easy to connect from the proxies for Dolphin Anty page.
The key: pairing IP and fingerprint
The profile's parameters must be consistent with each other and with the proxy: timezone and language to match the IP geo, the OS in the User-Agent to match the real one, fonts to match the system. A mismatch (e.g., a Russian IP and a New York timezone) is itself suspicious. The principles are in "Multi-Accounting Without Bans".
Case study: a ban across different IPs
An arbitrage specialist set up 8 ad accounts on 8 different proxies but worked from one regular Chrome — and all the accounts got banned. The reason: an identical fingerprint. After switching to an anti-detect with a separate profile per IP, linking stopped and the accounts came back to life. You can pick clean IPs for the profiles in the PROXYLEET catalog.
FAQ
Does a proxy hide the digital fingerprint?
No. A proxy changes only the IP. The fingerprint is handled by an anti-detect browser.
Will incognito mode help?
No. Incognito clears cookies and history, but the fingerprint stays the same.
Do I need an anti-detect for a single account?
For one — not necessarily, a clean IP is enough. For multiple accounts — it's mandatory.
Where can I get proxies for an anti-detect?
On the proxies for Dolphin Anty page or in the general PROXYLEET catalog.
