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About

Blockchain enabled timestamps for media files. Proof of ownership, proof of integrity, and proof of existence on mobile devices. BlockNotary Timestamp notarizes any media file, generating publicly verifiable receipt of its origin, date, authenticity, and integrity, without exposing its contents. Its uses include digital attribution, proof of existence, prior knowledge, integrity, and authenticity. Timestamp creates 100% distributed proofs using OTS (OpenTimestamps), IPFS (InterPlanetary File System) and public Bitcoin or Ethereum blockchains. Generated receipts are independently verifiable and machine-readable. Upload a media file to the app and securely store it in a distributed file system that is protected by the blockchain.

About

ProofSign is an electronic-signature and document-verification platform for individuals, professionals, teams and organizations signing finished PDFs. Users upload documents, invite signers and approvers, and run single- or multi-party workflows. Participants verify email access with a one-time passcode. ProofSign records signing intent, participant actions and timestamps in an audit trail. Completed PDFs include a SHA-256 fingerprint and evidence recipients can check through a public verifier without an account. The service supports agreements and finalized documents that need an auditable signing record and a way to detect later file changes. Its free plan allows single-party signing and verification for up to 10 documents monthly under fair use. Users can earn credits through onboarding and signing milestones. The Pro plan includes a verification API.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Blockchain solution for companies

Audience

Small and medium-sized businesses, freelancers, consultants, professional services firms, legal teams and developers who need straightforward electronic signing, multi-party agreement workflows, audit trails and independently verifiable document evidence.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

£0/month
The Free plan costs £0 and includes single-party signing and verification for up to 10 documents per month under fair use. Multi-party workflows and higher-volume use require credits. The Standard plan costs £6/month and includes 250 credits per month. The Pro plan costs £18/month and includes 900 credits per month plus verification API access. Annual billing is 20% off. One-time credit packs cost £10 for 100 credits, £25 for 300 credits or £75 for 1,000 credits; they do not expire and do not include subscription features. Users can earn up to 225 additional credits through identity-verification and signing milestones.
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Blocknotary
www.blocknotary.com

Company Information

ProofSign
Founded: 2025
United Kingdom
www.proofsign.app/

Alternatives

Alternatives

Nevtan Sign

Nevtan Sign

NevTan
TProof

TProof

TProof.io
Mindcat Sign

Mindcat Sign

Mindcat Technology Consultants FZE
Falkon Sign

Falkon Sign

Falkon Systems

Categories

Blockchain Supported

Categories

Digital Signature Supported

Integrations

No info available.

Integrations

No info available.
Claim Blocknotary and update features and information
Claim Blocknotary and update features and information
Claim ProofSign and update features and information
Claim ProofSign and update features and information