0 items
How?
Add the exact original files for this part of the record. Keep them unchanged; a different export or edit has a different fingerprint.
Add link and screenshots
The link is recorded, not fetched or verified.
Research
Keep the exact study protocol and analysis-plan version alongside the registry record.
Keep the exact study protocol and analysis-plan version alongside the registry record. Keep your original source records together, then date the exact files. It does not establish formal preregistration, data-collection timing, authorship, study quality, journal acceptance or satisfaction of clinical-trial reporting duties.
Your photos and files stay on your device, so keep them.
EXAMPLE
Study preregistration
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.
0 items
How?
Add the exact original files for this part of the record. Keep them unchanged; a different export or edit has a different fingerprint.
Add link and screenshots
The link is recorded, not fetched or verified.
0 items
How?
Add the exact original files for this part of the record. Keep them unchanged; a different export or edit has a different fingerprint.
Add link and screenshots
The link is recorded, not fetched or verified.
0 items
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.
Study preregistration
Study preregistration
01 · Keep the exact files
Keep the original files for study preregistration. Include any existing photos, signed records and source-system exports.
Records to keep: Protocol · Analysis plan · Code
Study preregistration
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.
Study preregistration
03 · Keep the evidence
Keep the original files and complete receipt separately, alongside any existing venue, signature and workflow records.
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
Related cases
Related cases from nearby fields. We don’t claim a time receipt would have changed the result.
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.
Center for Open Science
Formal preregistration snapshot and updates
Use the registration workflow and retained identifier; read-only originals and documented updates are different from private file dates.
Source summary as of 2026-10-29. Check the current source and applicable local rules.
Read the sourceAssociation for Psychological Science
Journal preregistration policy
Journal process requires the actual plan and repository access under its policy; a private fingerprint alone does not earn a badge or acceptance.
Source summary as of 2026-10-29. Check the current source and applicable local rules.
Read the sourceNational Institutes of Health
ClinicalTrials.gov registration and reporting policy
Applicable funding-policy dates and trial scope matter. Registry submission and results reporting are separate duties; no universal trial deadline or medical guidance offered.
Source summary as of 2026-10-29. 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
It does not establish formal preregistration, data-collection timing, authorship, study quality, journal acceptance or satisfaction of clinical-trial reporting duties.
It does not establish formal preregistration, data-collection timing, authorship, study quality, journal acceptance or satisfaction of clinical-trial reporting duties.
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.
Is a time receipt formal preregistration?
No. Follow the registry and journal process; keep the submitted plan and registration identifier.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWhat should I preserve?
Keep the exact protocol, hypotheses, analysis plan and code version that accompany the formal registration.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerCan a plan change later?
OSF describes update processes; preserve the original and document changes transparently rather than imply the first version was unchanged.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerCan I keep the plan private?
OSF describes embargo options, subject to platform and journal rules; a private receipt is not an embargoed registry entry.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerDoes this replace clinical-trial registration?
No. NIH-funded trials within the policy must use the actual registration and reporting process.
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.