OpenTimestamps
A timestamping toolset that creates and verifies proofs for files using the Bitcoin blockchain.
By The OpenTimestamps contributors
View the OpenTimestamps source code
Alternatives
About OpenTimestamps
OpenTimestamps provides a format and tools for creating proofs that data existed before a particular time, then verifying those proofs independently. Its website includes an in-browser stamper and verifier, and the command-line client can timestamp files and signed Git commits.
Timestamp creation can use remote calendar servers. Verifying proofs requires a local Bitcoin Core node.
Strengths
- Creates and verifies timestamp proofs
- Includes an in-browser stamper and verifier
- Can timestamp files and Git commits
Limitations
- Verifying proofs requires a local Bitcoin Core node
- Timestamp creation submits requests to remote calendar servers
Details
- Pricing
- FreeThe tools and default calendar servers are free to use.
- License
- LGPL-3.0-or-later
- Developer
- The OpenTimestamps contributors
- Platforms
- Web, Command line
- How it runs
- Downloadable app, Web application
- Account
- Not required
- Best suited for
- People who need independently verifiable timestamps for files or Git commits
- Categories
- Encryption tools, CLI tools
- Last verified
- Added
- Provenance
- Selected from the Homebrew formula
- Sources