Anyone can generate anything now. What nobody can generate is a record that was already on a public blockchain yesterday. 1SatSnap puts your file's fingerprint on Bitcoin SV — and the file never leaves your hands.
No account No upload Nothing to install Free
A convincing photo, video or document can be generated in seconds, by anyone, for nothing. The question has stopped being does this look real and become when did this appear, and has it changed. That second question has an answer, and it is the one 1SatSnap gives you.
Said plainly: this does not tell you whether an image was made by a machine, and nothing honest can. It tells you that this exact file existed at a point in time and has not changed since — which is the fact a court, an insurer or an editor actually needs, and the one a generator cannot manufacture after the event.
Most services ask you to upload the very thing you are protecting. For a law firm, a hospital or an auditor that is not a preference — it is the end of the conversation.
Your browser computes the fingerprint. We receive 32 bytes — nothing to leak, subpoena or lose.
Proofs are checked against a public block explorer, not our servers. Tamper with our database and the check fails rather than quietly passing.
Export a proof file and keep it with your document. It stays checkable whether or not 1SatSnap exists.
Written into the Bitcoin blockchain. Nobody — us included — can move it, backdate it, or quietly change it later.
A web page, not a download. Add it to your home screen and it behaves like any other camera.
Photo, video, contract, scan, design, recording. If it has bytes, it has a fingerprint.
No paid tier holding the useful parts back. This is the whole product.
No cryptography to understand. Nothing to configure.
Your browser computes the file's SHA-256 — 32 bytes that change completely if one byte of the file does. The file stays put.
Fingerprints go into a Merkle tree and only the root reaches Bitcoin — one transaction, thousands of proofs, same cost.
Share a link, export a proof file, or print a certificate. The recipient's own browser confirms the match.
A timestamp is only as good as the thing holding it. Ours is held by a public blockchain that anyone can read and nobody can rewrite — not us, not you, not whoever disputes your proof later.
Each anchor is a real transaction carrying your Merkle root. Once mined it is part of the chain's history, with the block's own time attached.
Every proof names its transaction. Paste it into a public explorer such as WhatsOnChain and read the record yourself — no permission, no account, no us.
An anchor is 249 bytes and costs 38 satoshis however many proofs ride in it. That economics is what lets this be free for you, rather than metered per file.
Only a 32-byte Merkle root goes on-chain — not your file, not its name, nothing identifying. The chain holds a number that proves your file without revealing it.
No wallet, no coins, no exchange, no seed phrase. We pay the fee. You use a camera and get a proof; the blockchain stays entirely out of your way.
Fingerprints are batched into a Merkle tree so a single on-chain record covers up to 20,000 files. One stamp or twenty thousand, the chain cost is the same.
One thread runs through all of it: the file matters, and it cannot be handed to a stranger.
Taken from the running system and the real chain. Not rounded in our favour.
An anchor is one 249-byte transaction costing 38 satoshis, however many fingerprints ride in it. The proof link works in about 200ms and the chain has it within a minute. A block takes roughly ten minutes — Bitcoin's pace, not ours. Twenty to forty is ordinary, and the app says so while it waits.
Most of this industry leaves it vague. A proof that collapses under scrutiny is worse than none — and scrutiny is the entire point.
Yes, with no paid tier holding features back. One anchor carries up to 20,000 proofs for 38 satoshis, so one more user costs us almost nothing. Free is what the architecture allows, not charity.
A 64-character hash, the filename you chose, and an anonymous key your browser generated. No account, no email, no file.
Export a proof file and keep it with the document. It holds everything a verifier needs. We tested this by switching our own server off and verifying anyway.
The link works immediately and the chain has it within a minute. A block averages ten minutes; twenty to forty is normal. That is Bitcoin's pace and nobody can hurry it.
Yes. Select as many as you like — they are hashed on your device and recorded together. Four hundred documents is one operation.
No, and that is correct. Messaging apps re-compress, which changes the bytes and so the fingerprint. Always send the original.
No, and be wary of anything that claims to. Detectors guess, and generators improve faster than detectors do.
What this gives you is the fact underneath: a file with a blockchain timestamp existed at that moment and has not changed since. A fake produced later cannot be given an earlier block. If your original is stamped, anything that appears afterwards is provably afterwards — and that is an argument you can make in a dispute, rather than a probability score.
Because a 32-byte record costs a fraction of a cent and stays permanent, which is what makes this free for you instead of metered per file. The transaction is small, public and readable through any explorer.
The proof itself is plain SHA-256 and a standard Merkle tree — nothing proprietary. The chain's job is to hold the timestamp where nobody, including us, can move it.
No. No wallet, no coins, no exchange, no seed phrase, no extension. We pay the transaction fee. You take a photo or pick a file and get a proof — the blockchain is plumbing you never have to see.
Yes — the one real obligation. The proof describes a specific file; without it there is nothing to check. Keep the original, and the proof file beside it.
Point it at something and you will have a proof before you finish reading this sentence. No account, nothing installed, nothing to pay.