Sports events

Preserve an exact export of organizer checkpoint records and its earlier versions alongside the original race timing system.

Preserve an exact export of organizer checkpoint records and its earlier versions alongside the original race timing system. Keep your original source records together, then date the exact files. It does not prove identity, authorship, truth, location, sending, receipt, consent, approval, completeness, rights or the outcome.

Try a file locally

Your photos and files stay on your device, so keep them.

EXAMPLE

Marathon or ultra race checkpoint chain

1 Nov 2026

Authority time: 14:02 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.

1. Original files for this record0 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 files

Add link and screenshots

Link to recordAdd screenshots

The link is recorded, not fetched or verified.

2. Write down anything you need to remember0 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 up

Write it down

New note

By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.

Photo of note

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.

Marathon or ultra race checkpoint chain

01 · Keep the exact files

Keep the original files for marathon or ultra race checkpoint chain. Include any existing photos, signed records and source-system exports.

Records to keep: Ordered timing mats or tag taps with time windows, device receipts per checkpoint

Marathon or ultra race checkpoint chain

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.

Marathon or ultra race checkpoint chain

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.

Choose a file

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.

Needs something else · US California event

Western States Endurance Run

Organizer course, aid-station and protest rules remain controlling.

The cited page, updated October 8, 2025, requires marked route, aid-station check-ins and departures before cutoffs. Rule-violation decisions use the organizer's own protest process; no private timestamp acceptance.

Source summary as of 2026-10-29. Check the current source and applicable local rules.

Read the source

Needs something else · Italy Switzerland named2026event

DoppiaW ULTRA W100

Organizer timing and checkpoint rules apply to the named race.

English2026regulations require chip timing, course/checkpoint compliance and organizer GPS equipment; Italian version is explicitly binding. A receipt is not any of those records or a finish ruling.

Source summary as of 2026-10-29. Check the current source and applicable local rules.

Read the source

Other ways to do this

Prices change. Check each provider’s site for current prices and service details.

LiveTiming by LiveTrail
Provides Organizer-configured checkpoint timing, withdrawals and bib controls.
Visit site
UltraSignup Race Timer
Provides multiple timing locations and laps with offline recording after event data retrieval.
Visit site
ultralive.net
Provides Ultra-distance tracking service with checkpoint reporting resources and downloadable timing sheets.
Visit site

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 prove identity, authorship, truth, location, sending, receipt, consent, approval, completeness, rights or the outcome.

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.

Does a missing split prove cheating?

No automatic inference is supported here. Western States has its own allegation, hearing and decision process; preserve the underlying records and context.