Technical reference
Chain identity and integration data
A dated fact sheet for node operators, miners, wallet developers, researchers, exchanges, and custodians. Unknown fields remain explicit.
Chain comparison
Three related states, distinct operational rules
Bitcoin BTC mainnet, the historical SHA-256d enforcement branch, and the intended Bitcoin BIP110 continuation share lineage but require separate identity checks.
| Property | Bitcoin BTC mainnet | Historical enforcement branch | Bitcoin BIP110 |
|---|---|---|---|
| Shared history | Through 961,631 | Through 961,631 | Inherits shared history and enforcement-branch blocks |
| First divergent height | 961,632 | 961,632 | 961,632; later BLAKE2b height pending |
| Proof of work | SHA-256d | SHA-256d | BLAKE2b after confirmed activation |
| Header format | Bitcoin 80-byte header | Bitcoin 80-byte header | BLAKE2b 164-byte header v2 in current development |
| Mining hardware | SHA-256d Bitcoin ASICs | SHA-256d Bitcoin ASICs | Specifically tested BLAKE2b hardware and firmware |
| Reduced-data rules | Not activated through BIP 110 | Original deployment never reached ACTIVE | Active with BLAKE2b in RC2 testnet code; mainnet pending |
| Difficulty | Bitcoin mainnet rules | Original inherited rules | Reset, adjustment, and boundary must be fixed in mainnet source |
| Replay behavior | Accepts ordinary Bitcoin transactions | Ordinary transactions remain mutually replayable | Opt-in SIGHASH_UNIFIED on RC2 testnet; mainnet pending |
| Reference software | Multiple Bitcoin implementations | Exact enforcing release and commit required | Fork-specific signed release, tag, and commit required |
| Asset identity | BTC | Historical branch state | Bitcoin BIP110; project-declared ticker BIP110 |
| Snapshot status | Active network | SHA-256d tip 961,638 observed 24 Aug 2026 | BLAKE2b testnet active; BLAKE2b mainnet inactive |
Exchange and custody integration
Fact sheet
Integration should begin after maintainers publish reproducible software and stable network parameters. The block-hash identity check is essential because the current RPC chain name, network magic, port, and address formats overlap Bitcoin mainnet.
- Exchange display name
- Bitcoin BIP110 (project declaration)
- Exchange ticker
- BIP110 (project declaration; services may choose another identifier)
- Asset type
- Native coin
- Consensus
- Proof of work
- Proof of work at observed branch tip
- SHA-256d at height 961,638, observed 24 August 2026
- Planned proof of work
- BLAKE2b header v2; final mainnet parameters pending
- Origin chain
- Bitcoin
- Last common height
- 961,631
- Last common block hash
- 00000000000000000000807f9dc917442a67910426d79ebb2f8aa2149327ce8a
- First divergent height
- 961,632
- First Bitcoin BIP110 block hash
- 0000000000000000000169eb6f811ddbd0daf343af7b62180cdb13e7c78dbc16
- First BLAKE2b mainnet height
- Unavailable. A mainnet activation height has not been published.
- First BLAKE2b mainnet hash
- Unavailable. No BLAKE2b mainnet block has been mined.
- Genesis block hash
- 000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f
- RPC network name
- main (not a unique Bitcoin BIP110 chain identifier)
- Required RPC identity check
- getblockhash 961632 must return 0000000000000000000169eb6f811ddbd0daf343af7b62180cdb13e7c78dbc16
- P2P network magic
- f9 be b4 d9 in current development source; identical to Bitcoin mainnet and subject to change
- Default P2P port
- 8333 in current development source; identical to Bitcoin mainnet and subject to change
- Address formats
- P2PKH 1... (0x00); P2SH 3... (0x05); SegWit bc1q...; Taproot bc1p...
- Decimal places
- 8
- Subsidy and halving
- Initial subsidy 50 BIP110; halves every 210,000 blocks; 3.125 BIP110 at height 961,638; next halving at 1,050,000
- Coinbase maturity
- 100 blocks
- Replay protection
- None active on the observed SHA-256d branch; opt-in SIGHASH_UNIFIED implemented on RC2 testnet; mainnet pending
- Reference node status
- No stable Bitcoin BIP110 mainnet release published
- Testnet reference candidate
- Bitcoin Knots 29.4.1 / Knots 20260508rc2; tag v29.4.1.knots20260508rc2
- RC2 commit
- c25ad6bcd18fa65cd78f176a52be062411507741
- Mainnet release hashes and signatures
- Unavailable because no stable mainnet artifacts have been published
- Website
- bitcoinbip110.org
- Technical contact
- Not yet published
- Security contact
- Not yet published
Machine-readable network snapshot
Download JSONJSON fields match this dated reference and retain pending values as explicit nulls.
Activation checklist
Evidence required for mainnet readiness
A mainnet announcement should be matched to signed, reproducible source and independent node observations. Testnet parameters do not substitute for a mainnet specification.
- Signed stable release tag and exact commit
- Reproducible binaries, hashes, and signatures
- Mainnet activation height and parent block hash
- BLAKE2b target shift and adjustment algorithm
- Exact header-v2 serialization and test vectors
- RDTS activation and expiry composition
- Required first-block coinbase commitment
- Replay-protection activation and wallet behavior
- P2P identity, seeds, ports, and network magic
- Independent observation of the first valid block
- Miner and firmware compatibility evidence
- Explorer and wallet chain-identity verification