Emailing a file to yourself, or relying on the “date modified” in a cloud drive, is the most common way people try to prove when something existed. It is better than nothing, but it rests on records that can be edited, deleted or simply disputed.
Why email dates are easy to challenge
- The date shown comes from the sending and receiving systems and can be edited in exported or forwarded copies
- The supporting records belong to your email provider, may be deleted when an account closes, and may be hard to obtain
- Attachments can be swapped in drafts, and a screenshot of an inbox proves very little
- Digital signatures on emails help, but the keys behind them are routinely changed by providers
| Emailing yourself | TimeBinder | |
|---|---|---|
| Who holds the record | Your email provider | The public Bitcoin blockchain |
| Can the date be edited? | In copies, yes; in the provider’s logs, not by you | No |
| Proves the file is unchanged? | Not on its own | Yes: re-check the file against its recorded fingerprint |
| Privacy | Your file sits on mail servers | Your file never leaves your device |
| Lasts if the account closes? | Often not | An ASAP TimeBind stays checkable on the blockchain |
A better routine
- Keep emailing or syncing copies as backups.
- TimeBind the files that matter: drafts, contracts, photos, recordings.
- Store the Proof of Time Certificate with the original files, and never edit the originals.
Related: poor man’s copyright and how verification works.
What a TimeBind proves, and what it does not. A TimeBind proves that your file existed no later than the time it was recorded on the Bitcoin blockchain, and that it has not changed since. It does not prove who created the file, that its contents are true, or that a court will admit it. It is independent evidence of timing to use alongside your other records, and it is not legal advice.
Frequently asked questions
Is emailing a file to myself proof of when it existed?
It is some evidence, but it is easy to dispute. The date in an email comes from the systems that sent and received it, and the records sit with your email provider.
What about cloud storage dates?
File dates in cloud drives and on your computer change when files are copied, synced or restored, and can be edited. They show when a copy was saved, not when the content first existed.
Should I stop emailing myself copies?
No. Keep doing it as a backup. Add a TimeBind for the files that matter so you also have independent timing evidence.
Start free: your first Pooled TimeBind each month costs nothing.