Bitcoin Stamps embed data directly in Bitcoin transactions using bare multisig outputs, storing it in the UTXO set where node operators cannot prune it. Every stamp is a permanent on-chain artifact, secured by Bitcoin itself with no off-chain dependencies.
The protocol was created by mikeinspace, with co-founders Arwyn and Reinamora. The community mascot is KEVIN, the first SRC-20 token.
stampchain-io is the protocol and indexer home: the reference indexer, the public API and block explorer, and the protocol specifications live here. Client libraries and developer tooling live in the sibling btc-stamps organization.
| Standard | What it does |
|---|---|
| SRC-20 | Fungible tokens stamped directly onto Bitcoin |
| SRC-101 | Decentralized naming system |
| SRC-721 | Non-fungible token standard for Stamps |
| SRC-721r | Recursion: stamps that reference and compose other stamps |
| OLGA | P2WSH encoding optimization for all stamp protocols |
| Repository | Description |
|---|---|
| btc_stamps | Indexer: parses and indexes all Bitcoin Stamps transactions |
   |
|
| stampchain.io | API and Explorer: public REST API and block explorer at stampchain.io |
   |
|
| tx-builder | Transaction Builder: Bitcoin Stamps and SRC-20 transaction library (NPM · JSR) |
   |
|
| stamps_sdk | SDK: TypeScript library for building with Bitcoin Stamps |
| stampchain-mcp | MCP Server: AI integration via Model Context Protocol |
| Standard | Description |
|---|---|
| stamps | Bitcoin Stamps Protocol Definition |
| src-721 | SRC-721 non-fungible token standard for Stamps |
| src721r-example | SRC-721r recursive token example |
| Glyphs | Fungible token meta-protocol built on Counterparty |
| Resource | Link |
|---|---|
| Protocol Documentation | bitcoinstamps.xyz (guides, tutorials, and protocol specs; source repo) |
| Technical Whitepaper | bitcoinstamps.xyz/en/whitepaper · Source |
| SIP Roadmap & Registry | bitcoinstamps.xyz/en/protocols/sips |
| SIP Process (SIP-0000) | GitHub Issue #686 |
| API Documentation | stampchain.io/docs (OpenAPI/Swagger reference) |
KuCoin · SuperEx · OpenStamp · Leather Wallet
Built with Bitcoin. Permanent by design. 🧡