ProofOfAuthenticity


> Developed by CHECKHC - Blockchain content certification experts

Overview

ProofOfAuthenticity is an n8n community node that provides blockchain timestamping with optional AI authenticity detection and C2PA content authenticity metadata.

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- Blockchain Timestamping - SHA-256 hash certified on Solana blockchain
- AI Authenticity Detection - Detect AI-generated vs human-created content
- C2PA Integration - Content Authenticity Initiative standard metadata

Operations

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Certify content with blockchain timestamp.

| Parameter | Description |
|-----------|-------------|
| Input Type | URL or Base64 |
| File URL/Data | The file to certify |
| Title | Certificate title (required) |
| Author | Author name (optional) |
| Description | Description (optional) |
| Certification Mode | Simple or AI + C2PA |

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Download the C2PA signed image file as binary output. Use this after creating a certificate with AI + C2PA mode.

| Parameter | Description |
|-----------|-------------|
| C2PA Download URL | The c2pa_download_url returned by Create Certificate (AI mode) |
| Binary Property Name | Output binary property name (default: c2pa_file) |

Output: Binary file with C2PA metadata embedded.

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Download the PDF certificate as binary output.

| Parameter | Description |
|-----------|-------------|
| IV Storage ID | The iv_storageid returned by Create Certificate |
| Binary Property Name | Output binary property name (default: pdf_certificate) |

Output: PDF document with certification details.

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List blockchain certificates with optional filters (hash, filename, signature).

Installation

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1. Go to Settings > Community Nodes
2. Select Install
3. Enter n8n-nodes-proofofauthenticity
4. Click Install

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``bash
cd ~/.n8n/nodes
yarn add n8n-nodes-proofofauthenticity
``

Configuration

1. Create a credential of type ProofOfAuthenticity API
2. Enter your DigiCryptoStore instance URL
3. Enter your API Key (Settings > API Keys)

Support

- GitHub: Issues/Discussions
- Email: contact@checkhc.net
- Website: https://checkhc.net

License

MIT

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