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.
chain of custody digital evidence
Give the next person a copy they can check.
Chain of custody digital evidence — Give the next person a copy they can check. Keep the collected file and the handler’s record. Check that the handed-over copy matches.
Your photos and files stay on your device, so keep them.
EXAMPLE
Evidence hand-off
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?
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.
Evidence hand-off
Evidence hand-off
01 · Keep the exact files
Keep the collected file and a separate custody log naming the handler, action and recorded time.
Records to keep: Evidence files · Hand-off note
Evidence hand-off
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.
Evidence hand-off
03 · Keep the evidence
Give the recipient the exact file and receipt. They can fingerprint their copy and compare it; retain your custody log too.
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.
England and Wales · 2024
Prove when a video was taken
A health trust used videos to try to show that a person had lied. A case report says the trust could not prove their dates, so that effort failed.
Legal commentary on a High Court decision; full reasoning was not checked because of a paywall.
Summarized on Oct 29, 2026
Read the commentary ›US - New York · 2026
Keep proof that recovered clips are real
A court found child neglect based on home-camera clips. The top court overturned that finding because key proof of the clips' source and lack of edits was missing.
Summarized on Oct 29, 2026
Read the commentary ›US - California · 2025
Fake exhibits can sink the whole case
A person used photos, videos and messages as court evidence. A case report says the court found at least two items were made with AI and threw the case out.
This account comes from a secondary article; the case year and details of any later challenge were not confirmed.
Summarized on Oct 29, 2026
Read the case summary ›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, Fed. R. Evid. 902(14)
Data copied from an electronic device, storage medium or file is self-authenticating if authenticated by a process of digital identification, shown by a certification of a qualified person; the 2017 committee note says identical hash values reliably show exact duplicates.
Supports hash matching for copies, but needs a qualified person's certification and notice. It does not address trusted timestamps specifically.
Source summary as of 2026-10-28. Check the current source and applicable local rules.
Read the sourceNY Court of Appeals, Matter of M.S. (2026)
Video evidence needs a sufficient foundation; circumstantial proof offered there was insufficient, with no account of the gap, selection, or tamper examination.
Authentication needs witness testimony and handling history in addition to any date proof.
Source summary as of 2026-10-28. Check the current source and applicable local rules.
Read the sourceeIDAS Regulation (EU) 910/2014, arts 41-42
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 sourceISO/IEC 27037 and vendor practice guides
Hash at acquisition, log every handler and transfer, rehash before presentation.
A timestamp supplements, not replaces, a custody log. Source is a vendor summary.
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 establish who made or collected the files, where or when they were originally captured, that what they show is true or genuine, that handling before the receipt was clean, or whether a court will admit them.
A file receipt does not establish identity, authorship or a complete custody chain, and does not replace a handler’s certification.
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 does a time receipt do for my evidence?
It records a fingerprint of each file and has an independent timestamp authority date it, then anchors it in Bitcoin. Later you can show these exact files existed by that date.
Do my evidence files get uploaded?
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.
Does this prove who collected the evidence or that it's real?
No. It proves the bytes existed by a time. Authorship, location and truth need other evidence such as witnesses and logs.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWill a court accept it?
Courts and other bodies decide. In US federal court, matching hash values can authenticate copies under Rule 902(14) with a qualified person's certification, so the receipt is a supporting piece, not a guarantee.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWhen should I get the receipt?
As early as possible, on the original files, before copying or editing. A receipt made later only dates the file from then, not from when it was captured.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWhy not trust the date in the file's own metadata?
Metadata like EXIF can be edited in seconds. An outside timestamp does not depend on the file's own claims.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerHow does the other side or a lab check a copy?
They fingerprint the copy they hold. If it matches the receipt, it is the same bytes; if one bit differs, it won't match.
Source summary as of October 30, 2026. Check the current source and its scope.
Context for this answerWhat does it 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.