Post-quantum document certification · Raptoreum network
Verifiable proof, for any document, any time.
Contracts, creative work, research, shipments, screenshots: whenever you need to prove something existed exactly as it was, on a specific date, without depending on anyone's word — not even ours.
Free trial when you sign up
Why it works for any document
Every stamp combines real post-quantum cryptography, standard timestamps, and a public, tamper-proof anchor.
Post-quantum signature (ML-DSA / SLH-DSA)
A real cryptographic signature using NIST FIPS 204 and FIPS 205 standards, resistant to quantum computers and verifiable offline with a public key.
Dual hash SHA-256 + SHA3-512
Each document is reduced to two complementary fingerprints: one universal for blockchain, one post-quantum for internal security. Verification is bit-for-bit.
RFC 3161 timestamp
A public (non-qualified) authority certifies the exact date of the document. No QTSP, no eIDAS promises we can't keep — full honesty.
On-chain anchor on Raptoreum
The hash is written into an OP_RETURN transaction on the Raptoreum blockchain. The block number and TxID stay public forever, in any country.
Self-verifiable certificate
The PDF certificate contains everything needed to verify it independently — with our verifier or your own tools. No intervention required from us.
Legal coverage in 30+ jurisdictions
The certificate cites applicable frameworks — eIDAS 2.0, FRE 901(b)(9), Italian Art. 2712 — ready to attach as documentary or expert evidence.
Use cases
Where proving authorship, integrity, or chronology can change the outcome.
Creators
Artists, writers, musicians, designers
The problem
Digital work spreads in seconds, but proving you created it first is expensive and complex. Screenshots and 'emailed to yourself' can be faked easily.
How CertiBlock helps
Stamp the file the moment you create it. The certificate links your work's hash to a blockchain block, publicly verifiable forever. If someone claims priority, your certificate provides the proof that settles it.
- When finishing a song, script, illustration, or novel draft
- Before sending a pitch or proposal to a client or agency
- Before uploading work to YouTube, Instagram, or Spotify
- Before presenting to investors or co-founders
Developers & product teams
Engineers, founders, product managers
The problem
When a leak, imitator, or IP dispute appears, 'we had it first' is only worth what you can prove. Git history can be rewritten, and a screenshot alone isn't proof in court.
How CertiBlock helps
Stamp source tarballs, design docs, or specs at key milestones. Each hash stays anchored on-chain — faking the timeline would require rewriting the blockchain.
- Publishing a release or tagging a version
- Finalizing an RFC, PRD, or architecture decision record
- Before presenting a pitch deck or a closed-alpha feature
- When delivering to a client or partner under NDA
Researchers & academics
PhD candidates, faculty, R&D teams
The problem
Priority disputes over results are common, and peer review is slow. Proving you had a result first can decide your career.
How CertiBlock helps
Stamp raw data, intermediate analyses, and drafts as you produce them. Each hash becomes a public, immutable timestamp.
- When completing an experiment and locking the raw dataset
- When sending a draft to a co-author or supervisor
- Before sharing with collaborators outside the institution
- Before a conference deadline, to protect against leaks
Legal professionals
Lawyers, notaries, compliance officers
The problem
Contract versions multiply across email threads. When a dispute arises, reconstructing 'which draft the other side saw and when' can be the core of the case.
How CertiBlock helps
Stamp each version the moment it's sent or received. The certificate cites eIDAS 2.0, FRE 901(b)(9), and equivalent frameworks — ready to attach to filings.
- Right before or after signing an NDA, LOI, or MSA
- Board minutes before circulation to directors
- KYC/AML reports at the time of filing
- Delivering the due diligence room between deal phases
Auditors & accountants
External audit, accounting firms, internal audit
The problem
Audit evidence must be provably unchanged between capture and final report. Regulators and judges ask whether the ledger or extract was exactly this one.
How CertiBlock helps
Stamp working papers, data exports, and extracts the instant they're produced. The hash proves the reviewed version is bit-identical to what's later cited.
- Locking working papers at audit milestones
- Archiving an accounting export pulled from the client ERP
- Signing management representation letters
- Tax filings and attachments before submission
Shipments & mail
Anyone sending something that matters
The problem
The package arrives damaged or empty, and the carrier tracks the box, not the contents. Proving what was inside before shipping seems impossible.
How CertiBlock helps
Photograph the contents before sealing the package. Stamp the photo. The certificate proves those exact pixels existed before the shipment.
- Sending a passport, ID, or contract by registered mail
- Returning a valuable item to a marketplace
- International shipments with customs disputes
- Sending legal documents to a lawyer or counterparty
Real estate & insurance
Tenants, owners, buyers, policyholders
The problem
Security deposits vanish over alleged pre-existing damage, and insurers dispute when damage occurred. Reconstructing it later is a nightmare.
How CertiBlock helps
Walk through the property, photograph every room and scratch, and stamp the photos on move-in and move-out. The certificate fixes that exact date.
- Moving in or out of a rental
- Documenting damage for auto, home, or travel insurance
- Before and after a renovation or repair
- Condition reports at the start of a lease or sale
Screenshots & digital trails
Harassment victims, parties in online disputes
The problem
Abusive messages or defamatory posts get deleted before you can report them. Screenshots are editable and the burden of proof falls on you.
How CertiBlock helps
Take the screenshot and stamp it immediately. The certificate proves the file existed on that specific date, long before any deletion or retroactive edit.
- Abusive messages, harassment, or threats on any platform
- Defamatory posts before the author removes them
- Online bullying of a minor by peers or adults
- Important chat conversations (agreements, promises)
Family archives & milestones
Parents, families, personal archivists
The problem
The first-steps photo, a grandparent's letter, or a family agreement lives with no verifiable date beyond easily edited metadata.
How CertiBlock helps
Stamp files when they matter. Decades later, the blockchain anchor still proves the file existed exactly as it was — independent of us or any cloud service.
- Major family milestones (birth, graduation, wedding)
- Letters and documents from or about a relative
- Childhood photos and videos whose date you want to prove
- Family agreements (informal copies — not a substitute for legal formalities)
About CertiBlock
CertiBlock is Wemsys' document certification solution: post-quantum cryptographic stamps anchored on a public blockchain.
Our mission is simple: make the chronology and integrity of your documents no longer a matter of trust. With CertiBlock, the proof doesn't depend on a company, a judge, or a cloud service — it depends on mathematics and a public, tamper-proof network.
Each stamp is generated with NIST post-quantum algorithms (ML-DSA and SLH-DSA), sealed in time with RFC 3161, and written to the Raptoreum blockchain. The result is a self-verifiable certificate anyone can check independently.
We run on the Raptoreum network for its open, community-driven model, and we publish verification tools so nobody needs our mediation. We don't outsource security — we build it in layers, and every layer is auditable.
Principles
Independent verification: any certificate can be checked without Wemsys' involvement.
Real post-quantum cryptography: NIST FIPS 204 and FIPS 205 standards, no marketing 'quantum'.
Legal honesty: we use public non-qualified timestamps and never promise what isn't.
Privacy by design: only the hash goes to the blockchain; content is never exposed.
Pricing
Pay for what you certify. No surprises, no hidden fees.
Free trial when you sign up
Create your account and start with complimentary stamps. No card, no commitment. Paid plans are coming soon.
Free trialPaid plans will be available soon.
Plans
Individual
From €2.99
per certification
- 1 certification per stamp
- Dual hash + post-quantum signature
- RFC 3161 timestamp
- On-chain anchor on Raptoreum
- Self-verifiable PDF certificate
Batch · 10
€25
€2.50 per certification
- 10 certifications
- Discounted batch price
- All Individual plan features
- Credits never expire
Batch · 25
€57.50
€2.30 per certification
- 25 certifications
- Progressive volume discount
- All Individual plan features
- Credits never expire
Batch · 50
€105
€2.10 per certification
- 50 certifications
- Progressive volume discount
- All Individual plan features
- Credits never expire
Batch · 100
€190
€1.90 per certification
- 100 certifications
- Maximum volume discount
- All Individual plan features
- Credits never expire
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