Doc Notary
Notarize any file with a tamper-proof on-chain hash
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Seal a file's SHA-256 fingerprint on a public blockchain, without putting the file on-chain. Anyone can verify a copy in their browser, free and with no account.
PH · launched Nov 5, 2026 · 1 upvote (top 65%) · 0 views
Niche: encryption and cryptography tools · 147 launches, 21 in the last 7 days ▲ +40% · Explore this niche →
Category and tags
- Legal
- Compliance & governance
- B2C
- Not AI
- Commercial product
- Productivity
- API
- Web3
Visit website ↗ Source listing ↗
More like this: all 147 launches in encryption and cryptography tools →
Could you build this?
Yes Hashing a file locally with SHA-256 and anchoring the digest in a blockchain transaction, with a browser verifier, is a small, well-documented pattern.
Competitors
Other products that read as similar to this one : 381 launches clear the similarity bar, closest 8 shown.
Attention rank: #156 of 382 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 365 days after the earliest competitor.
- Docmint · ph · 2026-11-03 · 1 upvotes · similarity 0.60
- GETOKEN File Proof · ph · 2026-11-10 · 1 upvotes · similarity 0.54
- Let's Seal · hn · 2026-07-27 · 94 upvotes · similarity 0.52
- StampR · ph · 2026-09-25 · 2 upvotes · similarity 0.51
- File Hasher · ph · 2026-10-13 · 1 upvotes · similarity 0.50
- SharpNote by USA Notary · ph · 2026-11-14 · 1 upvotes · similarity 0.49
- UploadToBlockchain · ph · 2026-11-03 · 2 upvotes · similarity 0.49
- LedgerBridge · ph · 2026-10-08 · 1 upvotes · similarity 0.48
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.