A blockchain-powered utility for creating immutable cryptographic proofs of file existence and integrity.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install timestamp
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install timestamp using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Timestamp?
The Timestamp skill provides a mechanism to anchor digital memory to the Bitcoin blockchain, creating a verifiable chain of trust for AI agents. By generating SHA-256 fingerprints of critical documents and anchoring them via OpenTimestamps, this skill ensures that files like memory logs, decision records, and core configurations are tamper-proof and historically accurate. This is a foundational tool within the Openclaw Skills ecosystem for agents that need to verify their own past states without relying on a central authority.
Unlike traditional backup systems, Timestamp does not store your files on the blockchain; it only records an opaque hash. This preserves total privacy while leveraging the massive computational power of the Bitcoin network to prove that a specific version of a file existed at a specific point in time. It turns mutable digital history into verifiable, permanent fact.
Timestamp Use Cases
- Creating immutable proofs for AI agent memory files such as MEMORY.md and SOUL.md.
- Verifying the integrity of critical project documentation and architectural decisions over time.
- Building a tamper-evident audit trail for automated workflows using Openclaw Skills.
- Protecting against unauthorized history revision in shared development environments.
How Timestamp Works
- The skill generates a SHA-256 hash of the target file to create a unique digital fingerprint.
- This hash is submitted to decentralized calendar servers without exposing the actual file content.
- The servers aggregate the hash into a merkle tree with thousands of other commitments.
- A single commitment is then anchored into a Bitcoin transaction, providing a globally recognized timestamp.
- Users can later verify the file by running a local check against the blockchain to confirm the original bytes haven't changed.
Timestamp Setup
To integrate this functionality into your environment, install the OpenTimestamps client via pip:
pip3 install opentimestamps-client
Once installed, you can begin using the provided scripts within the Openclaw Skills directory to stamp or verify your files immediately.
Timestamp Data Schema & Taxonomy
The skill manages data through the following file structures:
| Component | Description |
|---|---|
*.ots |
Small cryptographic proof files (approx. 5KB) stored next to the original files. |
.ots-archive/ |
A directory used to store historical proof files when the original files are updated. |
scripts/ |
Contains ots-stamp.sh for creation, ots-verify.sh for validation, and ots-auto-memory.sh for automation. |
Timestamp Advanced Features
- Auto-protection for core agent files including AGENTS.md and all files in the memory directory.
- Automated archiving of old timestamps to maintain a complete, verifiable history of file versions.
- Support for bulk timestamping of multiple files in a single execution for efficient workflow management.
- Non-intrusive verification that works with standard git versioning to provide high-assurance history for Openclaw Skills users.
SKILL.md
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