Help center
How-tos, troubleshooting, and answers to the questions we hear most often. Can't find what you need? Email contact@pruvstamp.com.
Getting started
What does Pruvstamp actually prove?
A Pruvstamp certification anchors a cryptographic hash of your photo or video on the Base L2 blockchain at a specific moment in time, signed by your hardware-attested device. Any third-party tool can re-compute the file hash and confirm the file existed at that timestamp on a real, untampered device. We do not certify the content's truthfulness — only its existence + provenance.
How do I certify a photo or video?
Open the Pruvstamp app, tap Capture, and shoot directly from the in-app camera. The hash is computed on-device, signed by the secure enclave, and anchored on-chain in the background. The resulting certification appears in My Library within a few seconds.
Can I certify a photo I already took?
No. Certifications must come from the in-app camera so we can attest the device, capture timestamp, and (optionally) GPS. Importing existing files would defeat the attestation guarantee — anyone could pre-edit the file off-device and claim it as original.
Subscriptions and quotas
What does each plan include?
Visit
pruvstamp.com/pricing for the current tiers. Free includes a small monthly cert quota and no cloud storage ; paid tiers add cloud storage (100 GB → 5 TB) and higher cert quotas.
What happens at the storage cap?
New uploads (marketplace listings, share-link uploads) are refused with a friendly error. Existing files are never auto-deleted — the cap only blocks creating new ones. We email you when you cross 80 % of the cap and again at 100 % so you have time to upgrade or free up space before the next upload.
Can I downgrade my plan?
Yes, anytime via Stripe Customer Portal (Settings → Subscription → Manage). If your downgraded tier has a smaller storage cap, the over-quota warning emails kick in as described above ; the existing files stay accessible.
Sharing and the marketplace
What's the difference between a share link and a marketplace listing?
A share link is a private URL you send to one or more recipients with optional password / expiry / clip rights. A marketplace listing is a public sales page where any user can purchase the certified file. Both rely on the same on-chain certification.
What happens to a buyer's downloaded file?
Free buyers have a 90-day window to download. After that the file is removed from Pruvstamp cloud and only the on-chain certification remains. Premium and above keep their purchases in their permanent library.
Account and security
How does two-factor authentication work?
Settings → Security → Two-factor authentication. Scan the QR with any TOTP app (Authy, 1Password, Google Authenticator). We generate ten one-time recovery codes you should save somewhere safe — they are the only way to regain access if you lose your authenticator.
What if I delete my account?
Settings → Danger zone → Delete my account starts a 48-hour grace window. We email you a cancel link ; if you don't click it within 48 h, all account data is permanently removed from Pruvstamp systems. On-chain certifications stay forever and remain verifiable from any third-party tool.
Why am I being asked to disable 2FA on an account before merging it?
When you merge two Pruvstamp accounts — by linking one's email to the other in your Settings — we move all your data (certifications, devices, sessions, linked identities) to the surviving account. The one thing we don't move is your 2FA setup. Each account has its own authenticator-app pairing and its own recovery codes ; they can't be combined cleanly. If we silently dropped the 2FA from the absorbed account, you'd think you're still protected when you're actually not — that's a security regression we refuse to ship.
So we ask you to disable 2FA on the account being absorbed first. Once the merge is complete, you can re-enable 2FA on the unified account and we'll generate a fresh QR code + recovery codes for you.
How to do it :
- Sign out of the account you're currently logged in to.
- Sign in to the account being absorbed (the one whose email you typed in the link form).
- Go to Settings → Two-factor authentication and click Disable 2FA. Enter your current 6-digit code or a recovery code to confirm.
- Sign out, then sign back in to the original account.
- Retry the link — this time it'll go through.
- (Recommended) Re-enable 2FA on the unified account from Settings → Two-factor authentication. Save the new recovery codes somewhere safe.
Affiliate program
How do I earn commissions?
Every account auto-receives a referral link (Settings → My referral link). Friends who sign up via your link and subscribe in the next 90 days earn you 20 % of their subscription for the next 6 months. Connect a Stripe payout account on the web affiliate dashboard to cash out.
Still stuck?
Email us at contact@pruvstamp.com. Include your account email, what you were trying to do, and any error messages you saw — that's usually enough for us to reproduce and reply within one business day.