Certify your texts, ideas and files with a Bitcoin blockchain timestamp
Check if a token is the issuer's stock token and how far its on-chain price is from the issuer price
Stage
Not given
Startup
Founded
Not given
Not given
Based in
ES
Not given
Pricing model
Freemium
Free
Pricing
Free plan: €0, includes unlimited Bitcoin certification, shareable proof links, REST API, and 3 web page captures per day. Pro plan: €4.90/month, adds RFC 3161 timestamping, eIDAS qualified certificates, official PDF certificates, 20 web page captures per day, and identity verification.
Not given
Key features
Bitcoin anchoring via OpenTimestamps protocol
SHA-256 fingerprint computed locally in browser
REST API for integration and automation
RFC 3161 qualified timestamps for European legal recognition
eIDAS-qualified PDF certificates from Sectigo
Web page capture and archiving
Optional identity verification via Stripe Identity
Webhook notifications for proof confirmation
Independent verification via opentimestamps.org
AES-256-GCM encryption for Pro stored content
Issuer registry verification against official Coinbase and Robinhood contract lists
Real-time price gap monitoring updated every 15 minutes
Issuer reference prices with age tracking against NYSE calendar
Impostor token detection for symbols and naming copies
Public read-only MCP server for AI agents
Six read-only MCP tools including find_stock_token and verify_stock_tokens
Data with time and source citations for verification
Daily public exam comparing answers against issuer registries
What makes it different
No trusted third party required—proofs remain verifiable forever without Proxae
Original content never leaves your device—only cryptographic fingerprint is transmitted
Mathematically immutable—proof dates cannot be modified without invalidating Bitcoin blockchain
Independent verification with no issuer affiliation or endorsement required
Transparent sourcing with every answer showing its source and data age
API-free integration for AI agents with no authentication or keys needed
Split price tracking by market session to explain closed-market drift
Proxae
Proof of Stock