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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.
Logistics
Cold-chain handoff checklist: preserve the exact temperature and custody records for each leg.
Cold-chain handoff checklist: preserve the exact temperature and custody records for each leg. Keep your original source records together, then date the exact files. It does not prove who created a record, its truth, physical location, custody, consent, approval, sending, delivery, acceptance or the outcome of a dispute.
Your photos and files stay on your device, so keep them.
EXAMPLE
Food cold-chain transfer between carriers with temperature and custody checkpoints
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.
Food cold-chain transfer between carriers with temperature and custody checkpoints
Food cold-chain transfer between carriers with temperature and custody checkpoints
01 · Keep the exact files
Keep the original files for food cold-chain transfer between carriers with temperature and custody checkpoints. Include any existing photos, signed records and source-system exports.
Records to keep: Chained receipts per handoff: logger reading photo, seal number, time, location
Food cold-chain transfer between carriers with temperature and custody checkpoints
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.
Food cold-chain transfer between carriers with temperature and custody checkpoints
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
Real cases: why the saved copy matters.
Real cases where dated records mattered. We don’t claim a time receipt would have changed the result.
US federal New York · 2017
Conflicting cold-chain records can leave facts unresolved
Two sides disputed whether berries were sound at loading and who chose the cooling cycle. Temperature records and other evidence conflicted. The court refused both requests to win without trial.
Summarized on Oct 29, 2026
Read the source ›US federal Third Circuit · 2019
Keep contract temperature limits with shipment readings
A carrier disputed fault after temperature records showed a food shipment went outside agreed limits. The appeal court kept wins for the broker and buyer. The opinion did not bind later cases in that court.
Summarized on Oct 29, 2026
Read the source ›US federal Illinois · 2018
Claims of thawing may need further proof
A customer said pork thawed after a container had the wrong temperature setting. The court let claims against the container firm continue. It did not yet decide that the claimed events or carrier role were proved.
Summarized on Oct 29, 2026
Read the source ›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.
FDA sanitary transportation rule
Covered operations have functional transport, equipment, training and written-record duties, with exemptions.
Food transport scope only; a receipt cannot replace temperature control or written procedures.
Source summary as of 2026-10-29. Check the current source and applicable local rules.
Read the source21 CFR 1.912
Required records may be originals, true copies or electronic records; specified agreements/procedures/training have retention periods tied to termination or end of use/duties.
Subpart O. Required records and availability remain; no independent receipt endorsement.
Source summary as of 2026-10-29. Check the current source and applicable local rules.
Read the sourceDVSA ATP guidance updated29January2026
Specified perishable-food international road movements require approved equipment and carried certificate or fixed certification plate.
Domestic-only transport has different rules; not a digital file-date acceptance rule.
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 prove who created a record, its truth, physical location, custody, consent, approval, sending, delivery, acceptance or the outcome of a dispute.
It does not prove who created a record, its truth, physical location, custody, consent, approval, sending, delivery, acceptance or the outcome of a dispute.
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 should a handoff bundle identify?
Use a practical inventory of shipment, logger, settings, readings and native handoff records. FDA duties depend on the role and covered operation; the inventory is not an official form.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerDoes one loading photograph show the whole trip stayed cold?
No. FDA transport controls still concern conditions during the operation; a dated photograph does not measure unseen intervals.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerAre electronic transport records allowed?
The cited US section permits electronic records as well as originals and true copies. Required content, retention and availability still apply.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerHow long should records be kept?
Check the applicable record category. The cited US section ties several 12-month periods to the end of agreements, use or duties, rather than simply the photograph date.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerDoes an export replace international vehicle approval?
No. The cited Great Britain guidance concerns specified international perishable-food movements and requires the actual approval certificate or plate.
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.