Bitcoin Cash Metadata Registry (BCMR)
bitcoin-cash · token · standard
A standard for publishing and authenticating descriptive metadata about Bitcoin Cash tokens, identities, and applications.
A Bitcoin Cash Metadata Registry (BCMR) is a structured JSON document that can describe token categories, identities, contract applications, and related resources. Wallets and explorers use registries to display human-readable names, symbols, decimals, icons, and descriptions.
Registries may be resolved through a known HTTPS domain or authenticated through an on-chain identity history and a published content hash. Authentication can show which identity published a particular registry version; it does not make every claim in that registry true.
BCMR data is application metadata, not CashTokens consensus state. Different registries can omit or disagree about an asset, and a malicious registry can mislabel one. Clients should expose provenance, verify content hashes when available, and avoid treating a name or icon as proof of value or issuer legitimacy.
Related terms
CashTokens
→Native Bitcoin Cash primitives for fungible tokens and non-fungible tokens attached to UTXOs.
bitcoin-cash · token · protocol
Token
→A transferable or accountable unit defined by a blockchain protocol, smart contract, or application ledger.
blockchain · asset
SHA-256
→A 256-bit cryptographic hash function used for transaction IDs, Merkle trees, and proof of work.
hashing · btc · bch
Unspent Transaction Output (UTXO)
→A discrete spendable output on a UTXO blockchain, similar to a digital coin that must be spent whole.
technical · blockchain