Certify your texts, ideas and files with a Bitcoin blockchain timestamp
Non-custodial USDT wallet for Ethereum and TRON without holding ETH or TRX
Stage
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Founded
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Based in
ES
EE
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.
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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
Send and receive USDT on Ethereum and TRON networks
No gas token required for transactions
Non-custodial key management
Review transaction details before signing
Restore wallet from recovery phrase
Open-source wallet core code
No sign-up or KYC required
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
Gasless USDT transfers without holding separate gas tokens
Fully non-custodial with user-controlled private keys
Proxae
Mesh