Collect evidence. Seal it. Let others check.
Business · Finance · Research
Evidence, packed and sealed
Collect evidence. Seal it permanently. Let others check.
Keep the sources, original files and observations behind your claims together in a verifiable evidence package.
In a world of convincing fakes and uncertain claims, being believed should not depend on who has the loudest voice. Everyone should be able to present evidence — and everyone’s claims should be open to the same scrutiny.
Leima helps you collect and preserve evidence of what you saw, what you made and what you were told. A permanent seal gives others a way to check that the evidence matches the record you created.
01 / Evidence within everyone’s reach
Digital records have existed for decades. What is new is how practical it has become for ordinary people to collect evidence, preserve its context and make later changes detectable. Cameras, sensors and cryptographic tools put that process within reach, with everyday capture costing little or nothing beyond the devices you already own.
Collection can be nearly free. Permanent sealing and analysis can carry costs.
02 / A process no party gets to control
When interests compete, any party may be tempted to shape the verification process in its own favour. A neutral coordinator gives everyone a common procedure and a record they can inspect — a role comparable to an independent assessor between parties.
That is the role Leima aims to serve: open methods, traceable evidence and the same checks for everyone. Its own process must be open to scrutiny too.
What you can build evidence for
Connect a claim to its source and the exact passage you rely on. Preserve the source alongside the citation so others can inspect the evidence.
For research, journalism, reports and AI-generated answers.
Explore a source citation →Give your work a documented history. Collect sketches, original files and records of its creation as evidence of where it came from.
For artists, collectors and anyone documenting a work’s origins.
Work with an evidence bundle →Show the process behind the result. Preserve drafts, work in progress and supporting observations as evidence of your contribution.
For creators and students. Evidence of a process helps reviewers assess human involvement; it does not certify the absence of AI.
Bring your supporting evidence →Build a record around visual evidence, with GPS location, motion, orientation and other available sensor data providing context for the capture.
The Android prototype currently collects photos, optional GPS and sensor logs. Video capture is not offered in this workflow yet.
Explore the field capture prototype →Preserve what a website showed. Keep captured content, its source URL and available collection details so others can examine the material behind your claim.
For published promises, public statements and content that may change.
Start with a webpage →Preserve original emails with their authentication results. Let others inspect the message and the available evidence of its sending domain and signed content.
For agreements, commitments and correspondence you may need to substantiate.
Check an original email →A shipping container for evidence
Bring your claim and supporting material together. A permanent seal makes later changes to the sealed files detectable.
Add a source and state your claim. Bring related evidence together using the bundle workflow.
Download the source and assessment in a package whose file fingerprints are committed to a permanent record.
Keep your package and give others a copy. They can inspect its contents and verify them against the seal.
Illustrative example / Source citation
A citation should let the reader follow the claim back to the evidence. Open each part of this fictional example.
Claim: “The product reduces every customer’s energy consumption by 18%.”
“Participating customers in the pilot reduced their energy consumption by an average of 18%.”
Example source: a fictional pilot report. A real package would include the source material and its recorded provenance.
The passage reports an average among pilot participants. It does not establish the same reduction for every customer. A narrower claim would be: “Pilot participants reduced their energy consumption by an average of 18%.”
For a real sealed package, the verifier compares the files with the permanently recorded fingerprints. That checks whether the material matches the sealed version. Readers can separately assess whether the source and interpretation are convincing.
This example explains the workflow; it is not a stamped report.
People and AI tools can examine the same material, challenge conclusions and make their own assessments. The strength of a claim depends on the evidence, its origin and how it was collected.
Give AI-generated claims an inspectable foundation. Keep the source alongside an assessment of whether it supports the claim, so readers can review the evidence themselves.
Leima records the cryptographic fingerprints of your evidence package on Arweave, a network designed for permanent data storage. These fingerprints let someone check whether the files they hold match the sealed record.
The idea is simple: as storage gets cheaper, keeping today’s data costs less and less. Arweave’s protocol paper reports a historical average decline in storage costs of about 38.5% per year.
A one-time upload fee funds a storage endowment. Arweave prices that contribution to cover 200 years of replicated storage at current costs. Its model needs only a 0.5% annual decline in storage costs to fund storage indefinitely, assuming an unchanged token price.
This gives us an economic basis for expecting records stored today to remain available 100 years from now and beyond, under the model’s assumptions and with the network continuing to operate. Future storage is funded up front, while technological progress makes the same data cheaper to keep.
For Leima, that lasting record is the seal. Your original files stay in your evidence package, which you keep and can check against it.
Download your package. Store it where you choose. Share it when you need to back up your words.
Keep your downloaded package safe. The permanent seal records cryptographic fingerprints; it does not store your original files.