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Cryptographic proof for events that get challenged later.

Logs say what happened. Receipts let someone else verify the record hasn't changed — without trusting your database. Built on ES256 signatures + RFC 3161 timestamps + Bitcoin anchoring.

Platform

The proof engine
What is CertNode?
How it works
vs alternatives
Trust & security
Reflex
Evidence Vault
Recover
Sentinel

Use cases

Chargeback defense
Delivery receipts
AI provenance
AI agents
Agentic commerce
Returns & warranty
Insurance evidence
Proof of creation
E-commerce
SaaS
Course creators
Marketplaces
Content platforms
Training data
Financial services

Developers

CertNode API
Documentation
Cryptographic stack
Receipt spec
Offline verifier
Conformance vectors
Transparency log
AI provenance docs

Resources

All resources
Chargeback calculator
vs Stripe Smart Disputes
vs Chargeflow
vs Disputifier
Verify a receipt
Support

Company

Pricing
Security
Privacy Policy
Terms of Service
Contact

Reflex chargeback defense: no monthly fee — you pay 15% only when a dispute is won.

support@certnode.io