ProofSnap

What is ProofSnap?

ProofSnap is a Chrome extension that captures web pages as legally admissible digital evidence with blockchain timestamping, SHA-256 hashing, and digital signatures, ensuring the authenticity and integrity of your captures.

How does blockchain timestamping work in ProofSnap?

ProofSnap uses OpenTimestamps to anchor a SHA-256 hash of your evidence to the Bitcoin blockchain, creating a cryptographic proof of when the capture was made. This timestamp is independently verifiable and cannot be backdated or tampered with.

Is ProofSnap free to use?

ProofSnap includes a 7-day free trial with all plans. Choose from flexible monthly or annual subscriptions: Essential ($8.99/month or $80/year), Professional ($16.99/month or $160/year), or Enterprise ($28.99/month or $280/year). Annual plans save 20%.

Is ProofSnap evidence legally admissible?

ProofSnap generates forensically sound evidence with cryptographic proofs aligned with eIDAS 2 standards for qualified timestamps and digital signatures. Admissibility depends on jurisdiction and specific legal requirements. Consult with legal professionals for specific cases.

Are screenshots admissible as evidence in court?

Regular screenshots can be challenged in court because they lack proof of when they were taken and whether they've been altered. Courts increasingly require authentication under rules like FRE 901/902 (US) or equivalent rules in other jurisdictions. ProofSnap addresses these challenges by creating a forensic evidence package that includes a SHA-256 cryptographic hash proving the content hasn't been modified, a digital signature for authenticity, a blockchain timestamp proving when the capture occurred, and full metadata. This makes your screenshot significantly more defensible than a plain ima

What makes ProofSnap evidence tamper-proof?

ProofSnap uses three layers of cryptographic protection: SHA-256 hashing (changing even one pixel produces a different hash), digital signatures (the manifest is signed with a private key), and blockchain timestamps (the manifest hash is anchored to Bitcoin via OpenTimestamps). Together these create a chain of integrity proving the evidence is authentic, unaltered, and captured at a specific time.

How does eIDAS 2 affect digital evidence in 2026?

The eIDAS 2 regulation (EU 2024/1183) is fully rolling out by the end of 2026, establishing stricter standards for electronic identification, digital signatures, and qualified electronic timestamps across all EU member states. Under Article 41, qualified electronic timestamps enjoy a legal presumption of accuracy. ProofSnap's cryptographic proofs align with eIDAS 2 requirements: SHA-256 hashing for data integrity, RSA-4096 digital signatures for authenticity, and blockchain timestamps for independent time verification.