The first solution in France to anchor your files in full on the blockchain — not just their fingerprint — and to seal them with a post-quantum signature. Your files are encrypted locally, digitally signed and stored for life on Arweave, with no subscription to keep them.
1 BPV Credit = 1 permanently engraved deposit (max 50 MB). Pay per deposit or via monthly credits — no recurring fee to keep your proofs.
Built on standards recognized by courts, governments and industry
For everyday disputes or to preserve vital family documents. Pull out your phone and create instant proofs with verifiable integrity, admissible in court.
Discover Individual PlansSecure your intellectual property, contracts, creations and official reports. A trusted cryptographic infrastructure compliant with the latest French case law.
Discover Professional PlansSix real-life situations where an ordinary photo is no longer enough — and where a BlockProve proof changes the outcome of the dispute.
In court, smartphone photos are dismissed within seconds: “metadata can be edited, the image may be retouched.”
A photo anchored on Arweave carries a verifiable cryptographic fingerprint and an enforceable date. The balance of power flips.
Read the full caseWithout a verifiable priority date, trade-secret law does not protect you. And the INPI's Soleau envelope caps out at a few megabytes.
Deposit gigabytes of source code or 3D blueprints, encrypted locally, timestamped for life.
Read the full case“You cleaned up before the adjuster arrived”: the classic argument used to reduce or deny compensation.
Instant blockchain anchoring attests the damage and the event happened at the same time. Verifiable.
Read the full caseA screenshot, even timestamped, doesn't prove the messages actually came from the social network: fake conversations can be fabricated in two minutes, and courts know it.
Log into the social network from the desktop app: the NF Z67-147 compliant web capture freezes the messages along with their source code and origin. Pleading a doctored screenshot becomes far harder.
Read the full caseFrance's Council of State (March 10, 2025) rejects ordinary smartphone photos. And a bailiff report costs €200 to €400 per visit.
One geolocated, anchored photo every week: a rock-solid body of evidence, for a fraction of a bailiff's fee.
Read the full caseAn ordinary screenshot can be fabricated in two clicks — and online content often vanishes before the hearing.
The BlockProve web capture freezes the entire page — URL, source code, DNS, timestamp — in a verifiable, timestamped way.
Read the full casePay once, preserve forever. Traditional cloud services delete your data if you stop paying. BlockProve uses the Arweave blockchain to permanently anchor your files on-chain.
We cannot read your files. No one can. Your data is AES-256-GCM encrypted before it ever leaves your device. Our servers only see unreadable data blocks.
Built to resist even tomorrow's supercomputers. BlockProve integrates post-quantum Dilithium signatures to preserve the integrity of your deposits over the very long term.
Defamation, counterfeiting, misleading product pages: freeze any web page before it disappears. Compliant with the AFNOR NF Z67-147 standard, eIDAS timestamped, anchored for life on Arweave.
| BlockProve | Competing Blockchain Apps | Traditional Cloud | |
|---|---|---|---|
| Data Storage | ✓ Full deposit stored on-chain | Only the hash — file stays on a central server | Centralized, inferior resilience to blockchain |
| Retention Period | ✓ Permanent lifetime storage (one-time cost) | Variable / dependent on third-party servers | Subscription — files deleted if payment stops |
| Post-Quantum Security | ✓ Dilithium signature engraved for life | ✗ Classical cryptography (vulnerable) | ✗ No (vulnerable to future quantum attacks) |
| Privacy | ✓ Zero-access encryption — local AES-256-GCM (E2EE) | Depends on implementation | Data readable by host (advertising / AI) |
| Standalone Autonomy | ✓ Desktop app connected directly to the blockchain | Requires technical expertise | ✗ 100% dependent on their infrastructure |
Your unused credits are refundable within 14 days. You only pay for the deposits you actually engrave.
Your proofs live on the Arweave blockchain. Even if BlockProve disappeared, they would remain accessible and verifiable for life.
Anyone can verify a proof with open-source tools, with no account and no fee — forever.
Verify a real proof →