Immutable Proof of Existence • Polygon Mainnet

Blockchain Permanence & Cryptographic Proof

Never worry about vendor lock-in or disputed document versions. Anchor SHA-256 contract hashes directly to Polygon Mainnet for eternal, decentralized verification.

polygonscan.com/tx/0x7f9a...

Polygon Block Confirmed

Transaction Hash:0x7f9a2b8e4c195f2d6e3c8801ab4d99c27f31...

Block Height:#59,281,402 (Polygon PoS)

SHA-256 Digest:e3b0c44298fc1c149afbf4c8996fb92427ae...

Timestamp:12-Oct-2026 14:32:08 UTC

Decentralized Proof: Permanent & Indelible Mathematical Integrity 100%

Zero Vendor Lock-In

Independent public proof

Polygon Mainnet

Enterprise PoS ledger

SHA-256 Hashing

Tamper-evident math

Zero-Login Verify

Public /verify portal

Architecture

How Decentralized Permanence Works

Your document contents remain 100% confidential. Only the irreversible SHA-256 mathematical fingerprint is anchored on-chain.

Deterministic Fingerprint

Cryptographic SHA-256 Hashing

Upon envelope completion, Inscriben computes a deterministic SHA-256 hash across the document's entire byte array.

On-Chain Ledger

Polygon Mainnet Anchoring

The document hash and timestamp are permanently written into an immutable transaction block on the public Polygon blockchain.

Visual Anchor

QR Code Embedding

A tamper-evident QR code is embedded on the final page, linking directly to the instant public verification portal.

Public Proof

Zero-Login Public Verification

Any auditor, court, or counterparty can drop the PDF into /verify or inspect Polygonscan to independently confirm validity.

Independent Verification

Why Decentralized Proof Matters

Traditional e-signature companies keep verification logs locked behind their proprietary paywalls. If they shut down, your proof vanishes.

Legacy Providers (DocuSign / Adobe)

•Verification depends 100% on their centralized database remaining online.
•Audit proof vanishes or requires fees if you terminate your subscription.
•Counterparties must register proprietary vendor accounts to inspect logs.
•Vulnerable to server outages, company acquisition, or database corruption.

Inscriben Digital Permanence

Anchored to Polygon Mainnet blocks forever with immutable cryptographic hashes.
Completely independent of Inscriben servers or commercial subscription status.
Free, public, instant verification via /verify or public blockchain explorers.
Mathematically impossible to alter a signed document retroactively.

Got Questions?

Frequently Asked Questions

Technical questions regarding blockchain proof of existence.

Does the document's text or confidential content go on the blockchain?

Never. Only the one-way mathematical cryptographic hash (SHA-256) is anchored on-chain. It is mathematically impossible to reverse-engineer or reconstruct document text or private party information from the hash.

Can documents be verified if Inscriben is unavailable or dissolved?

Yes! That is the core benefit of decentralized permanence. Because the transaction block is permanent on the public Polygon Mainnet, anyone can compute the PDF's SHA-256 hash locally and check Polygonscan directly without Inscriben's involvement.

Does verification require cryptocurrency or gas fees for signers?

No. Inscriben sponsors 100% of the blockchain network gas fees automatically. Signers and auditors verify documents completely free with zero wallet setup or crypto knowledge required.

Instant Public Verification

Verify a document right now

Drag and drop any signed Inscriben PDF to inspect its cryptographic seal and immutable blockchain hash.

Zero gas fees for users • Powered by Polygon Mainnet • 100% Open & Decentralized