Cronozen Proof

Cronozen Proof — Operational Decision Evidence Platform.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Proof Record: Records an AI execution as a Decision Proof Unit (DPU). Creates a cryptographically chained proof record with SHA-256 hash chain. Returns the created DPU with decision_id and chain hash.
  • Proof Verify: Verifies a specific proof record's cryptographic integrity. Checks hash consistency and returns verification status.
  • Proof Chain Verify: Verifies the entire SHA-256 hash chain integrity for a domain. Performs O(n) sequential verification of all Decision Proof Units and reports the first broken index if tampering is

What data it sees

Do you need an account

No: the server works without sign-in

Cronozen Proof — Operational Decision Evidence Platform.

Record, verify, and export AI-assisted decisions as cryptographically chained Decision Proof Units (DPUs).

  • proof_record: Create a DPU with SHA-256 hash chain linking
  • proof_verify: Verify individual proof integrity
  • proof_chain_verify: Validate entire hash chain for a domain
  • proof_get: Retrieve a DPU with full details
  • proof_export_jsonld: Export as JSON-LD v2.0 document
  • proof_public_verify: Public verification without auth

Built for compliance, audit trails, and AI governance.

How to connect

How to connect Cronozen Proof to Claude

The server address to paste into Claude settings:

https://proof--cronozen.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Cronozen Proof to ChatGPT

The server address to paste into ChatGPT settings:

https://proof--cronozen.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Cronozen Proof to Cursor

The server address to paste into Cursor settings:

https://proof--cronozen.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (6)

Raw names from tools/list. Only developers need these.

proof_recordRecords an AI execution as a Decision Proof Unit (DPU). Creates a cryptographically chained proof record with SHA-256 hash chain. Returns the created DPU with decision_id and chain hash.
proof_verifyVerifies a specific proof record's cryptographic integrity. Checks hash consistency and returns verification status.
proof_chain_verifyVerifies the entire SHA-256 hash chain integrity for a domain. Performs O(n) sequential verification of all Decision Proof Units and reports the first broken index if tampering is detected.
proof_getRetrieves a Decision Proof Unit by ID with full details including hash chain position, AI involvement, human control, evidence level, and compliance information.
proof_export_jsonldExports a Decision Proof Unit as a JSON-LD v2.0 proof document conforming to Cronozen Evidence Ontology. Includes compliance status, 6W extraction (Who/What/Where/When/How/Why), hash chain info, and policy snapshot.
proof_public_verifyPublicly verifies a DPU's cryptographic integrity without authentication. Checks SHA-256 hash validity, previous/next chain link integrity, and returns verification status. Anyone can verify — no credentials required.