Per-buyer fingerprints for downloads (PDF/images). DRM-free and screenshot-resilient. WooCommerce compatible.

Ashar Chougle

Developer docs: https://inkdnafingerprint.com/docs
Adds an invisible, per-buyer fingerprint to each download—no DRM.
Highlights 
* DRM-free: Buyers get normal PDFs/images. 
* Per-buyer fingerprints: Embedded at download time. 
* Screenshot-resilient: Survives common transforms (marking PDFs; detecting PDFs & images). 
* Privacy-aware: Marking happens server-side on your store. The plugin calls the InkDNA API from the server and writes a temporary marked copy locally. 
* Works with Woo downloadable products (no catalog changes).
<blockquote>
This plugin uses a fixed InkDNA API base endpoint: https://ashtonx24-inkdna.hf.space
</blockquote>
<h3>External services</h3>
This plugin connects to your InkDNA API from the server.
Service host 
– https://ashtonx24-inkdna.hf.space (API base)
What is sent (server → API) 
– For local product files: <code>POST /mark</code> with the PDF file as multipart/form-data. 
– For remote product URLs: <code>POST /mark/url</code> with JSON body <code>{ "url": "<source pdf url>" }</code>. 
– Headers on both requests: <code>X-Order-Id</code> (the WooCommerce order ID) and <code>X-API-Key</code> (set in Settings → InkDNA).
When it is sent 
– Only when a buyer initiates a download. The store server calls the InkDNA API, receives a fingerprinted PDF, stores it temporarily under <code>wp-content/uploads/inkdna-fingerprinted-downloads/</code>, and serves that local file to the buyer.
What returns 
– A fingerprinted (marked) PDF, unique per order.
Service policies 
– Terms: https://inkdnafingerprint.com/terms.html 
– Privacy: https://inkdnafingerprint.com/privacy.html 
– Refunds: https://inkdnafingerprint.com/refunds.html 
– EULA: https://inkdnafingerprint.com/eula.html

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