01
Hash locally
For Proof-only evidence, SHA-256 is calculated in your browser. The source file does not need to leave your device.
Privacy first European digital evidence infrastructure
Proof that stands.
Evidence that lasts.
Create, preserve and verify evidence of what existed, when it existed and what was declared, without exposing sensitive source material unnecessarily.
European-first architectureTamper-evident recordsIndependent by designOpen standards
Evidence recordEV-7F3A91C2
SEALEDManifest
f7c3…91adPlatform signatureVerified
Merkle batchIncluded
Independent anchorPending
SHA-256
84f2 9a7c 31d0 …Sealed. Signed. Independently verifiable.
A clear chain from source material to portable proof
Attestarium separates local hashing, the immutable evidence record, chronology and independent trust signals. You can see what each layer proves instead of relying on one vague green badge.
02
Seal immutably
A canonical manifest records the evidence details and an operational signing key signs the platform seal.
Tamper-evident03
Anchor chronology
Evidence events can share an adaptive Merkle batch and independent external trust anchors.
Explicit trust04
Verify anywhere
Export DDEP evidence packages designed to remain understandable beyond the current website or hosting provider.
Portable by designOwn your evidence
Private source material. Visible trust signals.
Proof-only evidence keeps source files on your device while Attestarium records the cryptographic fingerprint and declarations needed for the evidence event. Stronger identity, timestamp and preservation layers can be added when the job requires them.
Explore security & trustFile hashLocal browser
Evidence sealImmutable record
Merkle proofShared chronology
External trustIndependent provider
Assurance that matches the job
Start with evidence core, add stronger assurance when needed
Different disputes and transactions justify different levels of assurance. The platform keeps those layers distinguishable so the evidence remains explainable later.
Standard€19.95Platform evidence core
Qualified€29.95+ qualified timestamp
Identity Verified€39.95+ verified depositor
High Assurance€59.95Stronger trust configuration
Security by architecture
Private by default. Portable by design.
Confidential evidence is not publicly searchable. Sensitive account actions use strong authentication, sealed records are not edited in place, and portable evidence packages reduce dependence on one provider interface.
Attestarium
Ready to create your first evidence record?
Create a professional account, hash locally, review exactly what becomes immutable and seal when you are ready.