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How?
Use the exact existing record from your system. A file date does not verify its contents or the action it describes.
Add link and screenshots
The link is recorded, not fetched or verified.
tamper-evident logs
Keep each day’s export beyond the source system.
Tamper-evident logs — Keep each day’s export beyond the source system. Keep each day’s export and manifest. Date the copy independently of the system that made it.
Your photos and files stay on your device, so keep them.
EXAMPLE
Daily log seals
1 Nov 2026
Authority time: 14:02 UTC · example
Bitcoin block time: 14:10 UTC · example
Last checked: 15:02 UTC · example
Bitcoin block time: 14:10 UTC · example
Last checked: 15:02 UTC · example
✓ Dated◆ Permanent
Now keep it safe: three things
- Keep your photos and files unedited. The receipt only matches the originals. Put them in an album such as “My records”.
- Save this receipt to your camera roll.
Keep the receipt file too. The image is a handy copy; checking needs the file.
- Email it to yourself.Email it to myself
Your mail app opens a draft. Attach your receipt image and receipt file. Don’t attach your photos or documents. Timevolt does not send it or know whether it was sent.
Your record, one step at a time.
Your photos and files stay on your device, so keep them.
Local preview: files are fingerprinted here. Notes and progress stay in this browser. Keep downloaded copies; browser storage is not a backup.
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How?
Record the date, time, place and who you spoke to. New notes are saved separately rather than editing an old note.
How to keep notes that hold upWrite it down
By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.
By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.
How to keep notes that hold up
Write notes as soon as you can. Keep the original account rather than replacing it later; the venue decides what weight it gets.
- Write it down straight away, on paper or in the box on a step.
- Put the date, time and place at the top, and who you spoke to.
- Use their words where you can; separate what you saw from what you were told.
- Sign or initial a paper note, photograph it and add the photo.
- Never edit an old note. Add a new dated entry when something changes. A device save time is not independent time evidence or proof of event order.
Daily log seals
Daily log seals
01 · Keep the exact files
Export the day’s log and a manifest of files and sequence ranges. Include a previous checkpoint only if your manifest actually links it.
Use the source system’s own record.
Daily log seals
02 · Date the file’s code
Your device fingerprints the selected file or manifest. Dated follows an independent timestamp; Permanent follows Bitcoin anchoring.
An independent time, tied to the exact bytes.
Daily log seals
03 · Keep the evidence
Keep exports, manifests and receipts. Recheck fingerprints and missing periods with your existing scheduler and log-review tools.
Keep the originals too. A changed or compressed copy has a different fingerprint.
Try a file. It stays here.
Make a test receipt on this device.
By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.
or drop a file here
Real cases: why records made at the time matter.
Real cases where dated records mattered. We don’t claim a time receipt would have changed the result.
US · 2026
Replacing old log pages can trigger import action
A drug firm's log pages were removed and replaced, and camera dates were changed. The regulator found its reply too weak and put it on an import alert. The firm agreed to recall drugs.
Summarized on Oct 29, 2026
Read the letter ›US · 2026
Write lab results when the work happens
A drug firm's pencil log entries were later written over in ink. Pages lacked numbers. The regulator found its reply too weak and warned it could block imports or approvals.
This is a warning letter; the listed restrictions were possible consequences, not confirmed later actions.
Summarized on Oct 29, 2026
Read the letter ›US federal · 2021
Edited driving logs can lead to criminal penalties
A trucking owner admitted a scheme to falsify logs after thousands of edits. A report says the owner got home detention, a fine and a ban on owning a trucking firm. The firm's right to operate was also revoked.
Based on trade press reporting of the guilty plea and sentence.
Summarized on Oct 29, 2026
Read the report ›What courts, schemes and regulators say.
Positions below refer to the cited rule or record type, not endorsement of Timevolt. This service is not represented as an eIDAS qualified timestamp provider. A non-qualified timestamp does not receive the qualified timestamp presumption.
Federal courts, Federal Rules of Evidence 902(13) and 902(14)
Electronic records and copies authenticated by a hash value can be self-authenticating with a qualified person's certification and advance written notice; authenticity only, not hearsay or relevance.
Supports using a hash to show a copy matches an original; says nothing specific about third-party timestamps.
Source summary as of 2026-10-28. Check the current source and applicable local rules.
Read the sourceeIDAS Regulation (EU) 910/2014, electronic time stamps
Electronic or nonqualified form alone is not a reason to deny a timestamp legal effect or admissibility. Other evidence requirements still apply. Article 41(2) addresses the qualified-timestamp presumption, and Article 42 its requirements; provider status alone is insufficient.
This describes the statutory evidence rule, not Timevolt qualification or a guarantee of admission. No claim about cross-border recognition is made here.
Source summary as of 2026-10-28. Check the current source and applicable local rules.
Read the sourceFDA guidance on data integrity and cGMP (referenced in warning letters)
FDA warning letters cite failure to document original data permanently and contemporaneously, overwritten entries and unnumbered logbook pages as CGMP violations (21 CFR 211.22 in this letter); the Huons letter also cites backdated documentation.
FDA letters did not address cryptographic timestamps; the rules concern how records are made, not how they are dated afterwards.
Source summary as of 2026-10-28. Check the current source and applicable local rules.
Read the sourceFederal ELD hours-of-service rules
Falsifying or tampering with ELD records is a violation of federal ELD regulations; drivers can be placed out of service and cited. Source is trade press, not the rule text (49 CFR Part 395).
The ELD rule requires registered, certified devices; a time receipt supplements but does not replace them. Source is trade press, not the rule text.
Source summary as of 2026-10-28. Check the current source and applicable local rules.
Read the sourceOther ways to do this
Prices change. Check each provider’s site for current prices and service details.
Related workflows.
Proves / Doesn’t prove
Proves
A completed time receipt shows that the exact selected file existed by the independently witnessed time. You can check whether a later copy has the same bytes. It does not establish creation time, authorship, identity, event order, location or the truth of the contents.
Doesn’t prove
That the log was complete or accurate when closed, that entries inside it are true, who wrote them, or that a missing day's events never happened.
A missing receipt is an absence of evidence, not proof of tampering. Separate dated exports do not form a cryptographic chain by themselves.
These are the bounds of a completed proof. The local tester does not establish any time. The chosen court, scheme or regulator decides what to accept.
Questions, answered plainly.
Your file stays on your device. During normal receipt creation, your device sends a randomized code made from its fingerprint, plus encrypted recovery data. It doesn't send the plain fingerprint or the random value that opens the code. Keep the original file and the complete receipt for checking. Privacy Policy.
What exactly gets a time receipt each day?
A closed export of your log (a file). We fingerprint it on your device; the file is never uploaded. The receipt shows those exact bytes existed by that time.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWhy close the log before stamping it?
A receipt only covers the exact bytes it was made from. If the log is still growing, the saved file will not match. Rotate or export each day's log, then get the receipt.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerDo daily receipts link together like a chain?
Not by themselves. Each receipt covers only its own file. To cover a batch, stamp a manifest listing each file's fingerprint (ideally including the previous day's), and keep it with the files.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWhat happens if a day is missing?
A missing receipt creates a gap you can alert on. It shows that the receipt is absent from the collection you checked; investigate whether sealing failed or the receipt was lost. It does not prove what happened that day.
Does this prove the log is true or complete?
No. It proves these exact bytes existed by that time. If the log was wrong or incomplete when you closed it, the receipt will not fix that, and it does not show who wrote it.
Will an auditor or court accept it?
Electronic or nonqualified form alone is not a reason to deny a timestamp legal effect or admissibility. Other evidence requirements still apply. Article 41(2) addresses the qualified-timestamp presumption, and Article 42 its requirements; provider status alone is insufficient.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerHow is this different from immutable storage or emailing myself?
Email and storage dates are controlled by whoever runs the system. A receipt is dated by an independent timestamp authority and anchored in Bitcoin, so anyone can check it without trusting you.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerHow much does a daily seal cost?
See the Pricing page for current US-dollar plans and allowances. Fast is paused. Purchases open when receipts open.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerThe file tester runs on your device. It does not issue a timestamp or take a payment.
Keep the records you already have.
Keep your original files and any existing official records while the receipt service is being prepared.