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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.
enterprise
Keep the version you saved before the outcome.
Keep the version you saved before the outcome. Save the exact forecast, bid, test set or protocol, including a manifest of any related files.
Your photos and files stay on your device, so keep them.
EXAMPLE
Sealed before the outcome
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.
Sealed before the outcome
Sealed before the outcome
01 · Keep the exact files
Save the exact forecast, bid, test set or protocol, including a manifest of any related files.
Use the source system’s own record.
Sealed before the outcome
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.
Sealed before the outcome
03 · Keep the evidence
Keep the relevant submission acknowledgment and outcome record separately. Follow the venue’s own submission process.
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.
Federal Rules of Evidence, Rule 902(13) and (14)
Fed. R. Evid. 902(13) and (14)
Records generated by an electronic process, and data copied from an electronic source and authenticated by digital identification (a hash), can be self-authenticating with a qualified person's certification and advance notice to the other side. This is about authenticating the record, not its weight, and it does not name timestamps.
Source summary as of 2026-10-28. Check the current source and applicable local rules.
Read the sourceIETF RFC 3161 (Time-Stamp Protocol)
RFC 3161 token semantics
This is a technical standard, not a venue rule. A token is signed proof that a hash existed at or before the recorded time. The TSA never sees the content and does not identify the requester.
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
It does not show who wrote the file, that it is true or complete, that no earlier or other version existed, or that data collection had not already begun; it only fixes the time of those bytes.
A dated copy cannot exclude other versions, earlier data collection or prior knowledge. Comparing an outcome requires independent evidence of its timing.
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.
Can a time receipt prove my prediction came before the outcome?
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.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerDoes Timevolt see my file?
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.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerDoes it prove I wrote it?
No. An RFC 3161 token does not identify the requester or the author. Pair the receipt with your own records of authorship.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerIs a registry date or a git commit enough?
Different tools supply different records. A git author date is self-asserted; registries record their own submissions under their own processes. Keep those records. A file timestamp does not replace the registry or establish that data collection had not begun.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWill a court or a regulator accept it?
We cannot promise that. US evidence rules allow hash-authenticated electronic records with a certification, but weight and admissibility are decided case by case. Check the venue's own rules.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWhat should I seal and when?
Seal the final file, such as the protocol, the bid, the forecast or the test-set manifest, before the data or result exists. Seal again if you change it. Each version gets its own receipt.
How do I reveal it later?
Keep the exact original file. Anyone can re-hash it and compare the fingerprint to the receipt. A single changed byte gives a different fingerprint.
The 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.