DocProof
Cryptographic timestamps for documents — no file storage
DocProof launched on July 7, 2026 with 2 votes.
What it does
DocProof proves a document existed at a specific moment — without storing the file. Upload any file → SHA-256 fingerprint computed in memory → file discarded immediately. You get a UTC timestamp, a Proof ID, a shareable verification link, and a PDF certificate. Perfect for founders, freelancers, and developers who need to prove ownership before sharing. $9 one-time per proof — no subscription, no account required.
Prove a document existed at a specific moment. SHA-256 fingerprint + UTC timestamp + PDF certificate. No account, no file storage. $9 one-time.
Before you send a pitch deck, contract, or code snapshot — generate a cryptographic timestamp proving it existed at a precise moment. No account. No file storage. $9 one-time. Every proof includes a printable PDF certificate with your unique Proof ID, SHA-256 fingerprint, UTC timestamp, and a public verification link. Choose any file up to 25 MB (PDF, image, doc, ZIP, code). We fingerprint the exact bytes in memory. After the one-time $9 payment, we create a cryptographic proof with a UTC timestamp. PDF certificate ready in seconds. Share the link. Anyone can verify by re-uploading the original file — the SHA-256 hashes must match. No account needed. $9, no account, 30 seconds. Your file…from docproof.app
Does a similar job
all alternatives →- SVSeal – Verifiable timestamp for your private ideas2022 · docs.planet.ink · ▲113
- BTbtproof - trusted timestamping on the Bitcoin blockchain2013 · btproof.com · ▲75
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