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Timevolt / Water sample collection at the sampling point with collector and lab co-sign
environmental compliance

Keep an unchanged copy of a water-sampling record alongside the laboratory's own chain-of-custody process.

Keep an unchanged copy of a water-sampling record alongside the laboratory's own chain-of-custody process. 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.

Try a file locally

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

EXAMPLE
Water sample collection at the sampling point with collector and lab co-sign
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
  1. Keep your photos and files unedited. The receipt only matches the originals. Put them in an album such as “My records”.
  2. Save this receipt to your camera roll.

    Keep the receipt file too. The image is a handy copy; checking needs the file.

  3. 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 up
    Write 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.

      1. Write it down straight away, on paper or in the box on a step.
      2. Put the date, time and place at the top, and who you spoke to.
      3. Use their words where you can; separate what you saw from what you were told.
      4. Sign or initial a paper note, photograph it and add the photo.
      5. 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.
      Water sample collection at the sampling point with collector and lab co-sign
      Water sample collection at the sampling point with collector and lab co-sign

      01 · Keep the exact files

      Keep the original files for water sample collection at the sampling point with collector and lab co-sign. Include any existing photos, signed records and source-system exports.

      Records to keep: Sampling-point tag scan, bottle photo, time window, receiving lab handoff

      Water sample collection at the sampling point with collector and lab co-sign

      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.

      Water sample collection at the sampling point with collector and lab co-sign

      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 New Jersey · 2016

      Write the true sampling place and date

      A water operator admitted false test reports with wrong dates and sites. The state reported three years in prison, lost licenses and a permanent ban from public jobs. There was no proof of coliform germs in the water supplied.

      Summarized on Oct 29, 2026

      Read the source ›
      US North Carolina · 2016

      The collection site must match the sample papers

      A tester took water from a few sites but signed papers saying it came from the right locations. The tester pleaded guilty to false statements. The state account gave a intended sentencing date, not an actual sentence.

      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.

      Needs something else · US federal

      Covered public water systems under 40 CFR 141.33

      Retain required microbiological and turbidity analysis records for at least five years and chemical analysis records for at least ten years. Reports or permitted summaries include collection date, place, time and collector, sample type and analysis information.

      Current eCFR text opened. These are defined regulatory records and retention duties; an external receipt does not replace the underlying report or required fields.

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

      Read the source
      Needs something else · US federal guidance

      EPA 2017 unknown-contaminant incident sampling guidance

      The guidance calls for sample identity, location and collection time, sampler information and custody transfers on the chain-of-custody form; Appendix G provides an example.

      Scope: section 6.6 and Appendix G. This is contamination-response guidance, not a universal rule that every commercial carrier must sign: the guidance expressly describes common-carrier handling exceptions.

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

      Read the source

      Related workflows.

      Quarterly user access review: the reviewer list, decisions and removals frozen as submittedAccess or license request, manager approval and grantQuarterly user access review: the list shown to the reviewer, each keep/remove decision and proof removals happenedHuman-in-the-loop approval before an AI agent executes a high-impact action (refund, payment instruction, production change, customer message)Who was physically present at a members' or condo board meetingHuman-made process record

      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.

      Does a receipt prove where water was collected?

      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 answer
      Can it replace the laboratory's form?

      No. EPA guidance recommends using the receiving party's custody form, while the laboratory maintains its own records.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      What collection details matter in covered US records?

      The rule specifies date, place, time, collector and sample type, together with required analysis information. The applicable laboratory and program determine the actual workflow.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      How long should the original records stay available?

      For systems covered by this provision, microbiological and turbidity analysis records have a five-year minimum and chemical analysis records a ten-year minimum. Other record categories have separate periods.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      Does the sampling case prove the water was unsafe?

      No. The New Jersey account expressly says investigators found no evidence of coliform bacteria in distributed water, while still describing serious false reporting.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer

      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.