Tamper-proof PDF sales · Powered by blockchain

Sell PDFs. Prove they're real.

Every buyer gets a personalized, watermarked, blockchain-verified copy. Anyone can verify authenticity in seconds. Sell from your own free storefront page, your WooCommerce store, or both.

Start selling free → WooCommerce shop demoBuy a guide in a WordPress shop and get your personal copySocial Mini website & storefront demoA real storefront page with free and paid guides
1credit per fulfillment
SHA-256cryptographic proof
Tamper-evidenton Hyperledger Fabric
The problem with PDF sales

Digital products get pirated,
forwarded, and altered.

When you sell a PDF, you lose control the moment it's downloaded. Buyers share it, refund and keep it, or alter it to misrepresent your work. Meanwhile, buyers can't tell your original from a fake.

How it works

Four steps. Then it runs itself.

1

Create the product

Upload your PDF once. Set copyright owner and contact email. Choose whether to add a legal copyright page and blockchain QR.

2

Choose where it sells

Show it on your free storefront page, connect it to WooCommerce, or both. Set a price — paid to your own Stripe account — or make it free.

3

Buyer purchases

They pay on your storefront or in your WooCommerce store. Behind the scenes, YourProDesk personalizes their copy and writes a record to the blockchain.

4

Instant verified delivery

Buyer receives a magic-link email and downloads their personalized watermarked PDF. Anyone can later verify authenticity via tamper detection.

New · Mini website & storefront

No shop? Get your own page in minutes.

A free mini website at yourprodesk.com/@your-name — your photo, a few words about you, links, social icons, an email signup and your library of guides. Mobile-first, with themes you can make your own.

Free guides that grow your list

Readers get a personal, protected copy in exchange for their email address. Free guides use no credits — up to 500 deliveries a month.

Free

Paid guides, paid to you

Buyers pay by card on Stripe's checkout and the money goes straight into your own Stripe account. YourProDesk takes no commission — 1 credit per sale.

Stripe

Your own email list

An email signup on your page, with confirmed subscribers and CSV export. With Bulk Mail, your list is ready for campaigns.

500 free

Links and socials

Up to 12 link buttons, plus icons for YouTube, LinkedIn, X, Facebook, Instagram and TikTok — one link for your bio everywhere.

Included

Analytics

Views, downloads, sales and signups by day, and where your visitors came from. Bots are not counted.

Included

Receipts and refunds

Every buyer gets an order number in their email and their library. Refund a sale in two clicks — their copy stops working right away.

Included

Create your free page →   Read the guide

Features

Everything you need to sell PDFs with confidence.

Personalized watermark

Every buyer's name, order number, and purchase date embedded in their copy. If it leaks, you know who leaked it.

Included

Legal copyright page

Automatically appended to the PDF with full copyright statement, licensing terms, and licensor contact — customized per product.

Included

Verification QR code

Anyone can scan the QR on the copyright page to reach the tamper detection tool. Zero-friction proof of authenticity.

Included

Blockchain record

Each sale writes a tamper-evident record to Hyperledger Fabric — SHA-256 hash, timestamp, and unique certificate ID. Independently verifiable.

Included

Live tamper detection

Buyers and third parties upload their copy — YourProDesk hashes it, queries the blockchain live, and confirms cryptographic authenticity.

Included

WooCommerce native

Uses your existing WooCommerce store and payment gateway. No new checkout to configure. One webhook per product.

Included

Immutable products

Once created, product content is locked — buyers get exactly what was advertised, forever. Update? Publish a new version.

Included

Magic-link delivery

Buyers get their PDF via one-click magic-link email. No account creation friction at purchase time — password set on first login.

Included

Role-aware verification

Buyers see their own order. Sellers see who bought what. Third parties see just authenticity — nothing about anyone else.

Included

Legal protection

Insert legal notice. Protect your rights.

Every fulfilled PDF can carry an optional legal-notice page — a named copyright statement paired with a human-readable AI-use restriction. Deter both traditional infringement and automated scraping in one page.

Copyright statement page

Adds a final page naming the copyright owner, contact details, and standard legal wording. Every buyer walks away with a clear record of who owns the work and how to reach them.

Optional

Human-readable AI-use notice

A prominent, plain-English notice prohibiting use of the document for training, indexing, summarization, retrieval, or analysis by AI systems and machine-learning models without written permission.

Optional

Public blockchain QR

A QR code on the copyright page anyone can scan to independently verify the document's tamper-evident blockchain record. Third parties confirm authenticity without contacting you.

Optional

All three are per-product toggles at creation. Choose which layers of protection fit each product — no impact on price or credit cost.


PDF security

Bake in the watermark. Block editing. Optional password to open.

Three additional controls that ship with every fulfilled PDF. Sensible defaults protect against casual sharing without adding friction for legitimate buyers.

Watermark baked into the pages

The personalized watermark is merged into each page's content stream — not a floating annotation. Editing it out requires reconstructing the page, and every attempt still leaves the buyer's name visible.

Default on · Recommended

Restrict editing & copying

AES-256 encrypted with an internal key. Buyers open normally — no password prompt — but text copy, edits, and annotations are blocked in compliant viewers (Adobe, Preview, Foxit). Printing still works.

Default on · Recommended

Password to open the PDF

Optional per-product. Each buyer receives a unique 8-character password in their purchase email — and can reveal it again anytime from their library. Prevents casual forwarding of the file to friends.

Seller opt-in · Extra friction

These controls stack on top of the watermark, copyright statement, and blockchain record — layered protection instead of any single point of failure. No PDF security stops determined pirates, but every leak still traces back to the buyer whose name is baked into every page.

Why blockchain?

Not crypto-currency. Enterprise-grade proof.

Distribution runs on Hyperledger Fabric — a permissioned blockchain used by banks, supply chains, and healthcare systems. No mining, no gas fees, no speculation. Just a tamper-evident ledger you can query.

Every sale writes a small record: your product ID, buyer email hash, timestamp, and the SHA-256 hash of the delivered PDF. Nothing sensitive, nothing large. The record is tamper-evident — any later change would show.

When a buyer wants to prove their copy is authentic, YourProDesk hashes their file live, queries the blockchain, and compares. If they match, the copy is provably the one you sold. If they don't, it's been altered.

Pricing

1 credit per fulfillment.

Distribution uses the same credit system as Credible Documents. Higher YourProDesk plans unlock lower per-credit rates. Test webhooks are always free. Free guides on your storefront use no credits (up to 500 deliveries a month).

Free tier
$5 / credit
Pro tier
$2 / credit
Business tier
$1.50 / credit

Credits are purchased in packs — never expire. Distribution is included in every plan, with no per-product fees and no monthly commitment.

See full pricing
FAQ

Answers to the obvious questions.

Do buyers wait for blockchain confirmation?

No. Blockchain writes happen in the background after the PDF is delivered. Buyers get their download instantly.

What if I want to update the PDF?

Products are locked at creation to protect existing buyers. To update, publish a new version — old buyers keep their exact copy forever, new buyers get the new one.

Does the buyer need to create an account?

Yes, but it's a magic-link flow. They click a link in their purchase email and they're in — no password until they choose to set one later.

What happens if WooCommerce is down?

Buyer PDFs are preserved on YourProDesk servers forever. Even if you migrate away from WooCommerce, past buyers keep access to their downloads.

Can I test the whole flow without paying?

Yes. The setup wizard has a reserved validation email — WooCommerce sends a real webhook to us using it, and we confirm connection without creating an order or charging a credit.

Can I use this without WooCommerce?

Currently WooCommerce is the supported integration. Direct API access for custom integrations is available on request.

Ready to sell PDFs with proof?

Start free. 20 credits included. Set up your first product in under 10 minutes with the guided wizard.

Start selling free → Talk to us