{ "schema_version": "1.0", "updated_at": "2026-09-07", "status": "exchange-integration-reference", "asset": { "exchange_listing_name": "Bitcoin BIP110", "exchange_listing_ticker": "BIP110", "ticker_status": "project-declared; service adoption may vary", "asset_type": "native UTXO coin", "origin_chain": "Bitcoin", "decimal_places": 8, "base_units_per_coin": 100000000, "genesis_block_hash": "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f", "date_of_issue": "2026-08-08", "date_of_issue_basis": "First Bitcoin BIP110 branch block at height 961632.", "max_supply_coins_nominal": 21000000, "max_supply_units_nominal": 2100000000000000, "circulating_supply_at_issue_coins_nominal": 20067600, "circulating_supply_at_issue_base_units_nominal": 2006760000000000, "circulating_supply_at_issue_basis": "Subsidy-derived nominal issued supply through last common height 961631; does not subtract lost, burned, or otherwise provably unspendable outputs." }, "project": { "website": "https://bitcoinbip110.org/", "resource_directory": "https://bitcoinbip110.org/directory/", "technical_reference": "https://bitcoinbip110.org/technicals/", "developer_reference": "https://bitcoinbip110.org/developers/", "exchange_integration": "https://bitcoinbip110.org/exchanges/", "source_repository": "https://github.com/bitcoinknots/bitcoin" }, "fork_identity": { "last_common_height": 961631, "last_common_block_hash": "00000000000000000000807f9dc917442a67910426d79ebb2f8aa2149327ce8a", "first_bip110_height": 961632, "first_bip110_block_hash": "0000000000000000000169eb6f811ddbd0daf343af7b62180cdb13e7c78dbc16", "last_sha256d_height": 961639, "last_sha256d_block_hash": "00000000000000000001bbc439e13f749dca850d32c7a2834165338713027e65", "first_blake2b_height": 961640, "first_blake2b_block_hash": "0000000000000050c1e5f69672f459293be14f46e5a494e7a8c8541396f18eeb", "first_blake2b_date": "2026-08-30", "first_bip110_date": "2026-08-08", "first_bip110_timestamp_utc": "2026-08-08T20:12:12Z" }, "reference_software": { "implementation": "Bitcoin Knots", "minimum_reference_release": "29.4.1.knots20260508", "release_tag": "v29.4.1.knots20260508", "release_directory": "https://bitcoinknots.org/files/29.x/29.4.1.knots20260508/", "checksum_file": "SHA256SUMS", "signature_file": "SHA256SUMS.asc" }, "explorer": { "name": "Mempool.Guide", "base_url": "https://mempool.guide/", "transaction_url_template": "https://mempool.guide/tx/{txid}", "address_url_template": "https://mempool.guide/address/{address}", "circulating_supply_url": null, "circulating_supply_note": "No dedicated circulating-supply endpoint is currently published." }, "network": { "rpc_chain_name": "main", "default_p2p_port": 8333, "default_rpc_port": 8332, "p2p_message_start_wire_hex": "f9beb4d9", "p2pkh_prefix_hex": "00", "p2sh_prefix_hex": "05", "private_key_prefix_hex": "80", "bech32_hrp": "bc", "bip32_public_prefix_hex": "0488b21e", "bip32_private_prefix_hex": "0488ade4", "unique_identity_warning": "These identifiers overlap Bitcoin BTC mainnet. Use fork checkpoint hashes for chain identity." }, "proof_of_work": { "through_height_961639": "SHA256d", "from_height_961640": "BLAKE2b", "blake2b_activation_height": 961640, "blake2b_permanent": true, "target_spacing_seconds": 600, "legacy_target_timespan_seconds": 1209600, "blake2b_target_shift": 22 }, "block_headers": { "legacy_header_size_bytes": 80, "v2_header_activation_height": 961640, "v2_header_size_bytes": 164, "rpc_fields": [ "txcount", "header_version", "nonce2", "nonce3", "extranonce", "time_offset", "header_flags", "xor_key", "xor_key_mask_clear_bits", "mm_rhs" ] }, "temporary_reduced_data_window": { "activation_height": 961640, "expiry_basis": "previous block median time past", "expiry_time_utc": "2027-09-01T00:00:00Z", "max_block_weight": 800000, "blake2b_continues_after_expiry": true }, "monetary_policy": { "subsidy_halving_interval_blocks": 210000, "coinbase_maturity_blocks": 100, "subsidy_at_fork_coins": 3.125, "next_halving_height": 1050000, "max_money_sanity_constant_coins": 21000000, "nominal_issued_supply_at_split_coins": 20067600, "nominal_issued_supply_at_split_base_units": 2006760000000000 }, "replay_protection": { "ordinary_signatures_replayable_for_shared_inputs": true, "mechanism": "SIGHASH_UNIFIED", "hash_type_bit_hex": "20", "tagged_hash_name": "UnifiedSighash", "opt_in": true, "granularity": "per signature", "direction": "transactions using the algorithm on this chain do not verify on chains that do not implement it", "reverse_protection_for_ordinary_signatures": false, "script_types": [ "bare-or-P2SH", "segwit-v0", "taproot-key-path", "tapscript" ], "upstream_test_vector_count": 166, "signer_requires_all_spent_outputs": true }, "required_identity_checks": [ { "rpc": "getblockhash 961632", "expected": "0000000000000000000169eb6f811ddbd0daf343af7b62180cdb13e7c78dbc16" }, { "rpc": "getblockhash 961639", "expected": "00000000000000000001bbc439e13f749dca850d32c7a2834165338713027e65" }, { "rpc": "getblockhash 961640", "expected": "0000000000000050c1e5f69672f459293be14f46e5a494e7a8c8541396f18eeb" } ], "exchange_invariants": { "separate_btc_and_bip110_wallet_infrastructure": true, "address_string_is_not_network_identifier": true, "normal_withdrawals_must_exclude_shared_or_unknown_utxos": true, "checkpoint_failure_must_pause_deposits_and_withdrawals": true, "internal_amounts_should_use_integer_base_units": true, "customer_crediting_requires_exchange_defined_snapshot_policy": true }, "recommended_utxo_separation_states": [ "SHARED", "BIP110_ONLY", "BTC_ONLY", "UNKNOWN" ], "regtest_arguments": [ "-testactivationheight=blake2b@", "-rdtsexpiry=", "-blake2b_headline=" ], "sources": [ "https://bitcoinbip110.org/directory/#overview", "https://bitcoinbip110.org/directory/#integrations", "https://bitcoinbip110.org/technicals/", "https://bitcoinbip110.org/exchanges/", "https://bitcoinbip110.org/developers/", "https://bitcoinknots.org/files/29.x/29.4.1.knots20260508/", "https://github.com/bitcoinknots/bitcoin/blob/v29.4.1.knots20260508/doc/release-notes.md", "https://raw.githubusercontent.com/bitcoinknots/bitcoin/v29.4.1.knots20260508/src/kernel/chainparams.cpp", "https://raw.githubusercontent.com/bitcoinknots/bitcoin/v29.4.1.knots20260508/src/chainparamsbase.cpp", "https://raw.githubusercontent.com/bitcoinknots/bitcoin/v29.4.1.knots20260508/src/consensus/consensus.h", "https://raw.githubusercontent.com/bitcoinknots/bitcoin/v29.4.1.knots20260508/src/consensus/amount.h", "https://github.com/bitcoinknots/bitcoin/blob/v29.4.1.knots20260508/doc/unified-sighash.md", "https://bitcoinbip110.org/downloads/logo-orange-on-transparent-bg.svg", "https://bitcoinbip110.org/downloads/logo-black-on-transparent-bg.svg", "https://bitcoinbip110.org/downloads/logo-black-on-transparent-bg-with-contour.svg" ], "branding": { "preferred_logo": { "priority": 1, "name": "Orange logo", "url": "https://bitcoinbip110.org/downloads/logo-orange-on-transparent-bg.svg", "usage": "Preferred Bitcoin BIP110 logo." }, "secondary_logo": { "priority": 2, "name": "Black logo", "url": "https://bitcoinbip110.org/downloads/logo-black-on-transparent-bg.svg", "usage": "Use when the orange logo cannot be used." }, "dark_background_logo": { "name": "Black logo with white contour", "url": "https://bitcoinbip110.org/downloads/logo-black-on-transparent-bg-with-contour.svg", "usage": "Use when the black logo is presented on a dark background." }, "dark_background_example": { "url": "https://bitcoinbip110.org/downloads/logo-black-on-transparent-bg-with-contour.svg", "note": "The Resource Directory uses the same contoured SVG asset as the dark-background example." } } }