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For the complete documentation index, see llms.txt. This page is also available as Markdown.

Technical Reference

⚠️

Token Details

Property
Value

Name

CBTC (Canton Bitcoin)

Standard

CIP-56 (Canton Instrument Protocol)

Backing

1:1 with native BTC

Network

Canton Network

Deposit requirement

Taproot-compatible Bitcoin wallet (P2TR)

Transaction limits

0.0001 BTC minimum, 5 BTC maximum by default. Set per account and adjustable on request

Confirmations

6 Bitcoin blocks (~60 minutes)

Audit

Quantstamp

Network Environments

Environment
Registry URL
Coordinator URL
Bitcoin Network

Devnet

https://api.utilities.digitalasset-dev.com

https://devnet.dlc.link/attestor-2

Bitcoin Testnet

Testnet

https://api.utilities.digitalasset-staging.com

https://testnet.dlc.link/attestor-1

Bitcoin Testnet

Mainnet

https://api.utilities.digitalasset.com

https://mainnet.dlc.link/attestor-1

Bitcoin Mainnet

For full Instrument IDs per network, see Instrument ID Management.

Canton Network Requirements

To interact with CBTC you need:

  1. Canton participant node - connected to the target network (devnet/testnet/mainnet)

  2. CBTC DAR files - installed on your participant. All versions must be installed to access all live contract versions.

  1. OIDC provider - Keycloak (officially supported) or Auth0 (community example)

  2. Canton CLI - version 3.3.0+ for DAR upload scripts

  3. Prerequisites for CLI: jq, curl, java (11+)

DAR Upload

The upload script is idempotent - safe to re-run.

Fee Structure

✅ Confirmed: Mint and burn fees are 0%. There are no BitSafe fees on CBTC mint or burn operations.

Canton Transfer Costs

  • CBTC transfers on Canton cost approximately $3-5 per transaction (network gas, not BitSafe fees)

  • Cost varies based on payload size and UTXO count

  • Sending CBTC is generally more expensive than sending Canton Coin (CC) due to larger payload

GitHub Repositories

Repository
Version
Description
Link

cbtc-lib

v0.6.4

Rust SDK for CBTC operations (mint, burn, transfer)

GitHub

canton-lib

v0.6.1

Lower-level Canton interaction library

GitHub

CBTC DAR

cbtc-1.2.1

Daml packages, upload scripts, connect config

GitHub

Note: The crate name is cbtc. DAR versions and crate versions are numbered independently: cbtc-lib v0.6.4 ships DAR cbtc-1.2.1.

Transfer Speed

  • Canton transfers take a few seconds each

  • Practical throughput: ~500 transfers per 10-minute period

  • UTXO limit: 10 UTXOs per party (Canton recommendation). Exceeding this increases load and fees.

External Links

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