The flaw
What matters is who clicked, whether they understood what they agreed to, and in what order the parties committed.
Transaction-Integrity Infrastructure
Act on the transaction as fact.
W3Sign is the authentication layer for high-value transactions. Other platforms ask you to trust them. W3Sign makes the proof independent.
The shift
Forging a signature used to take skill. Now it takes a prompt.
AI has changed the risk profile for documents and identities. A convincing fake can be created quickly, while many signing systems still focus on whether a link was clicked rather than whether the transaction can be proven.
The cost
High-value deals fail after the handshake when a party disputes the version, authority, timing or evidence.
The answer
Trade needs protocols, not closed platforms. W3Sign creates proof that can be checked outside the signing platform.
The turn
W3Sign is not a network you join. It is a proof anyone can check.
A third party can verify signatures, documents and evidence without needing an account, app, membership or vendor-controlled database.
How it works
Verified going in. Bound at signing. Provable forever.
The signer, the document, the order of commitment and the independent proof trail are connected into one verifiable evidence package.
- 01
Triple layer verification
Cryptographic unequivocal proof of who signed what and when, not merely whoever holds the link.
- 02
Signature bound to the signer
The signature is tied to the verified person and the exact record.
- 03
Mutual proof of agreement
Each party can prove the other knew what was being signed.
- 04
Provable signing order
Who committed, and when, is captured as a sequence of evidence.
- 05
Independent verification
The proof can be checked without relying on W3Sign as the only source of truth.
See for yourself. Click to download the test doc
The document layer
The file is preserved, not just referenced.
When a document, video, audio file or image is signed, W3Sign enables independent verification of signing and document authentication from outside the W3Sign network.
Upload
The signed file is stored through the W3Sign IPFS gateway.
Preserve
The IPFS CID becomes the durable content address for retrieval.
Anchor
CID, hash, SignatureBucket, SignatureKey and event time are recorded as proof.
The proof path
A verifier checks the same evidence W3Sign checks.
The proof link returns the signing event. The event points to the file, the hash, the publisher and the exact record key.
- Open the proof link — no W3Sign account or membership required.
- Read the SignatureBucket and SignatureKey.
- Retrieve the CID exposed by the signing event.
- Fetch the file from a compatible IPFS gateway.
- Validate the SHA-256 hash to confirm the file matches the signed event.
The legal strength
Not “sign a PDF”. Prove the whole lifecycle.
W3Sign creates a tamper-evident evidence trail for the document lifecycle: identity, document hash, IPFS preservation, timestamping and exportable proof.
Prove the document
Hash and CID identify the exact file that was signed.
Prove the signer
Identity verification binds the event to the verified person or publisher.
Prove the time
Timestamping records the sequence of events.
Prove no change
Independent validation confirms the file and record still match.
The oracle use case
Trusted publishers become verifiable oracle providers.
A recognised source can publish signed data, documents or status updates into its own SignatureBucket. W3Sign proves who published it, when, and whether it changed.
Data provider
W3Sign
IPFS + Chain
Verifier
The frame
SWIFT for signatures.
When a bank receives a SWIFT message, it acts on it as fact because the authentication is the trust. W3Sign is that layer for signed transactions.
Begin
Begin with a single transaction.
Prove the document. Prove the signer. Prove the time. Prove nothing changed.
Contact W3Sign