Certify your texts, ideas and files with a Bitcoin blockchain timestamp
Searchable index of Bitcoin's public coordination record with Lightning payment access
Stage
Not given
Not given
Founded
Not given
Not given
Based in
ES
Not given
Pricing model
Freemium
Paid
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
Searchable index of Bitcoin IRC, mailing lists, GitHub, project repos, Core announcements, papers and source code
Citation tracking for all indexed sources
Lightning Network payment integration
Model Context Protocol (MCP) connector for AI tools
Argument assessment and contributor profiles
GitHub PR analysis and review automation
BLVM full node with formally specified consensus rules
Query credits system with no daily cap
Spec-lock with Z3 theorem proving in CI
Differential testing against Bitcoin Core and libbitcoinkernel
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
Pay-per-query model with Lightning Network, no subscription lock-in
Independent Bitcoin full node with formal consensus specification to reduce reliance on single implementation
Comprehensive public coordination record spanning 922k passages across IRC, GitHub, mailing lists and academic papers
GitHub App integration for automated PR review and advisory checks via Model Context Protocol
Transparent on-chain funding through Bitcoin Commons via Plebly escrow
Proxae
BTCDecoded