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ARC fingerprinting

If a copy leaks, you'll know exactly who.

Every EPUB you send is invisibly fingerprinted to its recipient. If a copy turns up where it shouldn't, upload it and ArcRoster names the reviewer it was issued to — with the download timestamp and a confidence score you can stand behind.

Invisible, per-copy fingerprinting

Each reviewer receives an individually fingerprinted EPUB. The mark is embedded invisibly across multiple locations in the text layer, unique to that recipient, and designed to survive common EPUB edits. Readers see the exact book you wrote — nothing visible, nothing that changes how it reads.

It is not DRM

Nothing stops your reviewers from reading normally on any device or app. There's no lock, no login, no restriction. The fingerprint is passive — it only matters if a copy turns up somewhere it shouldn't. That's the difference between accountability and DRM.

Upload a leak, get a name

When a suspected copy appears online, upload it. ArcRoster extracts the fingerprint, identifies the original recipient, and shows the download timestamp and an attribution confidence score. You go from 'someone leaked my book' to 'this reviewer, at this time' in seconds.

Then act on it

Generate a DMCA takedown notice, block the reviewer from future campaigns, and let their reliability score reflect the leak — so they never get another ARC from you by accident. Your ARC terms, finally enforceable.

Explore more
Reliability scoringWhat to do when your ARC leaksWatermarking vs fingerprinting vs DRMvs BookFunnel
Questions

Common questions.

Is ARC fingerprinting the same as DRM?
No. There's no lock, no login, and no restriction — nothing stops your reviewers from reading normally on any device or app. The fingerprint is passive and only matters if a copy turns up somewhere it shouldn't. That's the difference between accountability and DRM.
Will my readers notice the fingerprint?
No. The mark is embedded invisibly across multiple locations in the text layer, unique to each recipient. Readers see the exact book you wrote — nothing visible, nothing that changes how it reads.
How does ArcRoster identify who leaked a copy?
Upload the suspected file and ArcRoster extracts the fingerprint, names the reviewer it was issued to, and shows the download timestamp with an attribution confidence score. You go from “someone leaked my book” to “this reviewer, at this time” in seconds.
What can I do once I know who leaked it?
Generate a DMCA takedown notice, block the reviewer from future campaigns, and let their reliability score reflect the leak — so they never get another ARC from you by accident. Your ARC terms, finally enforceable.
What file format is supported?
EPUB today — the format almost every ARC team already sends. The fingerprint is designed to survive common EPUB edits. If you need MOBI or PDF, tell us during the beta; it helps us prioritize what to build next.
Your next launch, reviewed

Build an ARC team that actually shows up.

We're opening ArcRoster to the first 100 indie authors. Free during beta, early pricing locked in for life — in exchange for telling us what to build next.