6 files changed, 291 insertions, 0 deletions

diff --git a/tests/fixtures/chain-tools/explorer-blocks.json b/tests/fixtures/chain-tools/explorer-blocks.json
new file mode 100644
index 0000000..795d6e4
--- /dev/null
+++ b/tests/fixtures/chain-tools/explorer-blocks.json
@@ -0,0 +1 @@
+{"blocks":[{"cbAddr":"BDnXDAAvEameyQk12FrtvBiPBp9MsfRmUA","cbValue":5000000000,"hash":"7c0e819cec25ebe29452049f1b35479526ba679bc2c1b00407417109384dea76","height":2,"nTx":2,"size":331,"time":1753315440},{"cbAddr":"B61KYnjpfXHN2w2e1nR869HneK4P1Gz4va","cbValue":5000000000,"hash":"17bdb455d41592adbff4aa97b7fca2091fef69600e67306baca829ab5a588b30","height":1,"nTx":2,"size":331,"time":1753315320},{"cbAddr":"BDU4zj6apurZ7YWNxsndaTt75PMgzvwbN4","cbValue":5000000000,"hash":"5bd7cb255d814e48cebcdfb72da4dc87b34bd774227f8ceb546c5640f4bdc169","height":0,"nTx":1,"size":278,"time":1753315200}],"count":3,"network":"bitflash","tipHeight":2}
diff --git a/tests/fixtures/chain-tools/fair-launch-report.json b/tests/fixtures/chain-tools/fair-launch-report.json
new file mode 100644
index 0000000..d35f30b
--- /dev/null
+++ b/tests/fixtures/chain-tools/fair-launch-report.json
@@ -0,0 +1 @@
+{"attestation_payload_sha256":"bf192bdbbb84c69d15bb68cf133abd474d0e1021600febc68e9f1a9de844b2af","chain":{"coin":100000000,"message_start_hex":"bf205cfd","name":"Bitflash","ticker":"BTF"},"checks":{"computed_merkle_matches_header":true,"genesis_has_single_transaction":true,"genesis_hash_matches_source":true,"genesis_merkle_matches_source":true,"genesis_supply_is_50_btf":true,"genesis_transaction_is_coinbase":true},"coinbase_outputs":[{"block_hash":"5bd7cb255d814e48cebcdfb72da4dc87b34bd774227f8ceb546c5640f4bdc169","coinbase_txid":"1a45b4482532abb29b10e234d3f13132230525a339ecea91658ffa675a5b1325","height":0,"outputs":[{"script_pub_key_hex":"4104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac","value_btf":"50.00000000","value_satoshis":5000000000}],"value_btf":"50.00000000","value_satoshis":5000000000},{"block_hash":"17bdb455d41592adbff4aa97b7fca2091fef69600e67306baca829ab5a588b30","coinbase_txid":"d6967c16013f1da136183f962aefd2f15e59b6836043f8ef49aadb92f38dca05","height":1,"outputs":[{"script_pub_key_hex":"76a914111111111111111111111111111111111111111188ac","value_btf":"50.00000000","value_satoshis":5000000000}],"value_btf":"50.00000000","value_satoshis":5000000000},{"block_hash":"7c0e819cec25ebe29452049f1b35479526ba679bc2c1b00407417109384dea76","coinbase_txid":"d55af2c80e8b70a9ae8f362a8aac5448e7925267c7f737d1fa0d227fd472a657","height":2,"outputs":[{"script_pub_key_hex":"76a914666666666666666666666666666666666666666688ac","value_btf":"50.00000000","value_satoshis":5000000000}],"value_btf":"50.00000000","value_satoshis":5000000000}],"deterministic":true,"external_timestamping":{"instructions":["Save the canonical JSON report.","Run: ots stamp bitflash-fair-launch-report.json","Later verify with: ots verify bitflash-fair-launch-report.json.ots"],"recommended":"OpenTimestamps","status":"not_embedded"},"genesis":{"bits":"0x1f0fffff","coinbase_txid":"1a45b4482532abb29b10e234d3f13132230525a339ecea91658ffa675a5b1325","computed_merkle_root":"1a45b4482532abb29b10e234d3f13132230525a339ecea91658ffa675a5b1325","hash":"5bd7cb255d814e48cebcdfb72da4dc87b34bd774227f8ceb546c5640f4bdc169","merkle_root":"1a45b4482532abb29b10e234d3f13132230525a339ecea91658ffa675a5b1325","nonce":3141,"outputs":[{"script_pub_key_hex":"4104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac","value_btf":"50.00000000","value_satoshis":5000000000}],"time":1753315200,"time_utc":"2025-07-24T00:00:00Z","tx_count":1},"scanned":{"block_count":3,"first_height":0,"last_height":2,"non_coinbase_transactions":2,"total_coinbase_btf":"150.00000000","total_coinbase_satoshis":15000000000},"schema":"bitflash-fair-launch-report-1","source_constants":{"genesis_bits":"0x1f0fffff","genesis_hash":"5bd7cb255d814e48cebcdfb72da4dc87b34bd774227f8ceb546c5640f4bdc169","genesis_merkle_root":"1a45b4482532abb29b10e234d3f13132230525a339ecea91658ffa675a5b1325","genesis_message":"Bitflash 24/Jul/2026 Fair launch: one CPU one vote, no premine","genesis_nonce":3141,"genesis_time":1753315200,"genesis_time_utc":"2025-07-24T00:00:00Z"},"source_mode":"local-block-files","verdict":"FAIR_LAUNCH_BASELINE_VERIFIED"}
diff --git a/tests/fixtures/chain-tools/utxo-proof-verification.json b/tests/fixtures/chain-tools/utxo-proof-verification.json
new file mode 100644
index 0000000..a40c673
--- /dev/null
+++ b/tests/fixtures/chain-tools/utxo-proof-verification.json
@@ -0,0 +1 @@
+{"checks":{"leaf_hash_matches_target":true,"root_matches":true,"schema_is_supported":true},"commitment":{"computed_root":"6e49b47ffccb178b62402235343ae7c55ec4a03effe19debb8c057e8ffc5b3c0","expected_root":"6e49b47ffccb178b62402235343ae7c55ec4a03effe19debb8c057e8ffc5b3c0","leaf_hash":"da964462812e40c918d6349baa57aee1dc838416eca44ccd31b782f0d1542d7b","path_length":3},"deterministic":true,"failures":[],"schema":"bitflash-utxo-proof-verification-1","target":{"created_height":2,"outpoint":"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a:1","value_btf":"17.50000000","value_satoshis":1750000000},"verdict":"UTXO_PROOF_VERIFIED"}
diff --git a/tests/fixtures/chain-tools/utxo-proof.json b/tests/fixtures/chain-tools/utxo-proof.json
new file mode 100644
index 0000000..154c45b
--- /dev/null
+++ b/tests/fixtures/chain-tools/utxo-proof.json
@@ -0,0 +1 @@
+{"chain":{"coin":100000000,"message_start_hex":"bf205cfd","name":"Bitflash","ticker":"BTF"},"commitment":{"algorithm":"sorted-outpoint-merkle-sha256","leaf_count":5,"leaf_domain":"BTFUTXO1","node_domain":"BTFNODE1","root":"6e49b47ffccb178b62402235343ae7c55ec4a03effe19debb8c057e8ffc5b3c0"},"deterministic":true,"proof":[{"duplicated":false,"hash":"7a4f4f13aaf91f8b6b32d1fb22feaa3d0398782504915e9c156e60fdeca1255d","level":0,"side":"left"},{"duplicated":false,"hash":"5f91d5ba472b7d6ab96e9ce99d689896dad3c264d3abbce4c77f257687608943","level":1,"side":"right"},{"duplicated":false,"hash":"f041ba6a82fbc6759f0632f412dd8aab971ac1317358d6f204af3e57da4d12de","level":2,"side":"right"}],"scanned":{"first_height":0,"last_height":2,"main_chain_block_count":3,"raw_block_count":3,"side_blocks_ignored":0,"tip_hash":"7c0e819cec25ebe29452049f1b35479526ba679bc2c1b00407417109384dea76","tip_time":1753315440,"tip_time_utc":"2025-07-24T00:04:00Z"},"schema":"bitflash-utxo-inclusion-proof-1","target":{"leaf_hash":"da964462812e40c918d6349baa57aee1dc838416eca44ccd31b782f0d1542d7b","leaf_index":1,"outpoint":"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a:1","txid":"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a","utxo":{"coinbase":false,"created_block_hash":"7c0e819cec25ebe29452049f1b35479526ba679bc2c1b00407417109384dea76","created_height":2,"created_txid":"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a","script_pub_key_hex":"76a914555555555555555555555555555555555555555588ac","txid":"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a","value_btf":"17.50000000","value_satoshis":1750000000,"vout":1},"vout":1},"verdict":"UTXO_INCLUSION_PROOF_CREATED","warnings":{"legacy_duplicate_output_overwrites":0}}
diff --git a/tests/fixtures/chain-tools/utxo-report.json b/tests/fixtures/chain-tools/utxo-report.json
new file mode 100644
index 0000000..c6e98ee
--- /dev/null
+++ b/tests/fixtures/chain-tools/utxo-report.json
@@ -0,0 +1 @@
+{"chain":{"coin":100000000,"message_start_hex":"bf205cfd","name":"Bitflash","ticker":"BTF"},"checks":{"all_scanned_merkle_roots_match":true,"genesis_hash_matches_source":true,"genesis_merkle_matches_source":true,"no_missing_spends":true},"commitment":{"algorithm":"sorted-outpoint-merkle-sha256","leaf_domain":"BTFUTXO1","node_domain":"BTFNODE1","root":"6e49b47ffccb178b62402235343ae7c55ec4a03effe19debb8c057e8ffc5b3c0"},"deterministic":true,"scanned":{"first_height":0,"last_height":2,"main_chain_block_count":3,"raw_block_count":3,"side_blocks_ignored":0,"tip_hash":"7c0e819cec25ebe29452049f1b35479526ba679bc2c1b00407417109384dea76","tip_time":1753315440,"tip_time_utc":"2025-07-24T00:04:00Z"},"schema":"bitflash-utxo-set-commitment-1","stats":{"coinbase_minus_unspent_btf":"1.50000000","coinbase_minus_unspent_satoshis":150000000,"duplicate_outputs":[],"missing_spends":[],"normal_transactions":2,"spent_outputs":8000000000,"total_coinbase_btf":"150.00000000","total_coinbase_satoshis":15000000000,"total_fees_btf":"1.50000000","total_fees_satoshis":150000000,"total_unspent_btf":"148.50000000","total_unspent_satoshis":14850000000,"utxo_count":5},"utxos":{"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a:0":{"coinbase":false,"created_block_hash":"7c0e819cec25ebe29452049f1b35479526ba679bc2c1b00407417109384dea76","created_height":2,"created_txid":"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a","script_pub_key_hex":"76a914444444444444444444444444444444444444444488ac","txid":"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a","value_btf":"12.00000000","value_satoshis":1200000000,"vout":0},"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a:1":{"coinbase":false,"created_block_hash":"7c0e819cec25ebe29452049f1b35479526ba679bc2c1b00407417109384dea76","created_height":2,"created_txid":"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a","script_pub_key_hex":"76a914555555555555555555555555555555555555555588ac","txid":"218609b2969dc0b6ae1c378ae255bbed863902987df4c943200e3c291b0e4c2a","value_btf":"17.50000000","value_satoshis":1750000000,"vout":1},"24bddfded9e22c2f98d9369e9ac00a4eccc8dcf05a2d1b9e12d94fd9f62ababc:1":{"coinbase":false,"created_block_hash":"17bdb455d41592adbff4aa97b7fca2091fef69600e67306baca829ab5a588b30","created_height":1,"created_txid":"24bddfded9e22c2f98d9369e9ac00a4eccc8dcf05a2d1b9e12d94fd9f62ababc","script_pub_key_hex":"76a914333333333333333333333333333333333333333388ac","txid":"24bddfded9e22c2f98d9369e9ac00a4eccc8dcf05a2d1b9e12d94fd9f62ababc","value_btf":"19.00000000","value_satoshis":1900000000,"vout":1},"d55af2c80e8b70a9ae8f362a8aac5448e7925267c7f737d1fa0d227fd472a657:0":{"coinbase":true,"created_block_hash":"7c0e819cec25ebe29452049f1b35479526ba679bc2c1b00407417109384dea76","created_height":2,"created_txid":"d55af2c80e8b70a9ae8f362a8aac5448e7925267c7f737d1fa0d227fd472a657","script_pub_key_hex":"76a914666666666666666666666666666666666666666688ac","txid":"d55af2c80e8b70a9ae8f362a8aac5448e7925267c7f737d1fa0d227fd472a657","value_btf":"50.00000000","value_satoshis":5000000000,"vout":0},"d6967c16013f1da136183f962aefd2f15e59b6836043f8ef49aadb92f38dca05:0":{"coinbase":true,"created_block_hash":"17bdb455d41592adbff4aa97b7fca2091fef69600e67306baca829ab5a588b30","created_height":1,"created_txid":"d6967c16013f1da136183f962aefd2f15e59b6836043f8ef49aadb92f38dca05","script_pub_key_hex":"76a914111111111111111111111111111111111111111188ac","txid":"d6967c16013f1da136183f962aefd2f15e59b6836043f8ef49aadb92f38dca05","value_btf":"50.00000000","value_satoshis":5000000000,"vout":0}},"verdict":"UTXO_COMMITMENT_VERIFIED","warnings":{"legacy_duplicate_output_overwrites":0}}
diff --git a/tests/scripts/test_bitflash_tools.py b/tests/scripts/test_bitflash_tools.py
new file mode 100644
index 0000000..3b4c846
--- /dev/null
+++ b/tests/scripts/test_bitflash_tools.py
@@ -0,0 +1,286 @@
+#!/usr/bin/env python3
+"""Regression tests for deterministic Bitflash Python tooling."""
+
+import json
+import os
+import struct
+import subprocess
+import sys
+import tempfile
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+SCRIPTS = ROOT / "scripts"
+FIXTURES = ROOT / "tests" / "fixtures" / "chain-tools"
+sys.path.insert(0, str(SCRIPTS))
+
+import bitflash_chain as chain  # noqa: E402
+
+
+def run(args, **kwargs):
+    env = dict(os.environ)
+    env["PYTHONIOENCODING"] = "utf-8"
+    return subprocess.run(
+        [sys.executable] + [str(a) for a in args],
+        cwd=str(ROOT),
+        env=env,
+        check=True,
+        text=True,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        **kwargs
+    )
+
+
+def write_block_file(path, blocks):
+    with Path(path).open("wb") as f:
+        f.write(b"noise")
+        f.write(chain.MAGIC)
+        f.write(struct.pack("<I", chain.MAX_BLOCK_PAYLOAD + 1))
+        f.write(b"still-noise")
+        for block in blocks:
+            payload = chain.ser_block(block)
+            f.write(chain.MAGIC)
+            f.write(struct.pack("<I", len(payload)))
+            f.write(payload)
+
+
+def p2pkh_script(byte):
+    return "76a914%s88ac" % (bytes([byte]) * 20).hex()
+
+
+def make_tx(vin, vout):
+    tx = {
+        "version": 1,
+        "vin": vin,
+        "vout": vout,
+        "lock_time": 0,
+    }
+    tx["txid"] = chain.hash_hex(chain.ser_tx(tx))
+    return tx
+
+
+def make_coinbase(label, script_byte, value=50 * chain.COIN):
+    return make_tx(
+        [{
+            "prevout_hash": "0" * 64,
+            "prevout_n": 0xFFFFFFFF,
+            "script_sig_hex": label.encode("ascii").hex(),
+            "sequence": 0xFFFFFFFF,
+        }],
+        [{
+            "value_satoshis": value,
+            "value_btf": chain.format_money(value),
+            "script_pub_key_hex": p2pkh_script(script_byte),
+        }],
+    )
+
+
+def make_spend(prev_txid, prev_n, outputs, label):
+    return make_tx(
+        [{
+            "prevout_hash": prev_txid,
+            "prevout_n": prev_n,
+            "script_sig_hex": label.encode("ascii").hex(),
+            "sequence": 0xFFFFFFFF,
+        }],
+        [{
+            "value_satoshis": value,
+            "value_btf": chain.format_money(value),
+            "script_pub_key_hex": p2pkh_script(script_byte),
+        } for value, script_byte in outputs],
+    )
+
+
+def make_block(prev_hash, txs, ntime, nonce):
+    merkle = chain.merkle_root([tx["txid"] for tx in txs])
+    header = (
+        struct.pack("<i", 1)
+        + bytes.fromhex(prev_hash)[::-1]
+        + bytes.fromhex(merkle)[::-1]
+        + struct.pack("<III", ntime, chain.GENESIS_BITS, nonce)
+    )
+    block = {
+        "hash": chain.hash_hex(header),
+        "version": 1,
+        "previous_hash": prev_hash,
+        "merkle_root": merkle,
+        "computed_merkle_root": merkle,
+        "time": ntime,
+        "time_utc": chain.utc(ntime),
+        "bits": "0x%08x" % chain.GENESIS_BITS,
+        "nonce": nonce,
+        "tx_count": len(txs),
+        "transactions": txs,
+        "source_file": "synthetic",
+        "source_offset": 0,
+        "size": 80 + len(chain.ser_compact_size(len(txs))) + sum(len(chain.ser_tx(tx)) for tx in txs),
+    }
+    return block
+
+
+def fixture_chain():
+    genesis = chain.reconstructed_genesis()
+    spend1 = make_spend(
+        chain.GENESIS_MERKLE,
+        0,
+        [(30 * chain.COIN, 0x22), (19 * chain.COIN, 0x33)],
+        "spend genesis with 1 BTF fee",
+    )
+    block1 = make_block(
+        genesis["hash"],
+        [make_coinbase("fixture coinbase 1", 0x11), spend1],
+        chain.GENESIS_TIME + 120,
+        4001,
+    )
+    spend2 = make_spend(
+        spend1["txid"],
+        0,
+        [(12 * chain.COIN, 0x44), (17 * chain.COIN + 50_000_000, 0x55)],
+        "split spend with 0.5 BTF fee",
+    )
+    block2 = make_block(
+        block1["hash"],
+        [make_coinbase("fixture coinbase 2", 0x66), spend2],
+        chain.GENESIS_TIME + 240,
+        4002,
+    )
+    return [genesis, block1, block2], {
+        "genesis_outpoint": "%s:0" % chain.GENESIS_MERKLE,
+        "first_spend_txid": spend1["txid"],
+        "proof_outpoint": "%s:1" % spend2["txid"],
+    }
+
+
+def compare_golden(name, actual, update):
+    path = FIXTURES / name
+    if update:
+        path.parent.mkdir(parents=True, exist_ok=True)
+        path.write_bytes(actual)
+        return
+    # The tools promise canonical LF-terminated JSON. On Windows checkouts a
+    # fixture may still appear as CRLF in the working tree; normalize only line
+    # endings so content, field order and compact serialization still drift-test.
+    expected = path.read_bytes().replace(b"\r\n", b"\n")
+    if actual.replace(b"\r\n", b"\n") != expected:
+        raise AssertionError("golden mismatch: %s" % name)
+
+
+def assert_true(cond, msg):
+    if not cond:
+        raise AssertionError(msg)
+
+
+def run_genesis_smoke():
+    genesis = chain.reconstructed_genesis()
+    outpoint = "%s:0" % chain.GENESIS_MERKLE
+
+    with tempfile.TemporaryDirectory(prefix="bitflash-tool-tests-") as tmp:
+        tmp = Path(tmp)
+        datadir = tmp / "datadir"
+        datadir.mkdir()
+        blk1 = datadir / "blk0001.dat"
+        blk2 = datadir / "blk0002.dat"
+        write_block_file(blk1, [genesis])
+        blk2.write_bytes(b"")
+
+        fair = run([SCRIPTS / "verify-fair-launch.py", "--datadir", datadir,
+                    "--max-blocks", "1", "--json"]).stdout
+        fair_report = json.loads(fair)
+        assert_true(fair_report["verdict"] == "FAIR_LAUNCH_BASELINE_VERIFIED",
+                    "fair launch verifier failed synthetic genesis")
+
+        utxo = run([SCRIPTS / "verify-utxo-set.py", "--datadir", datadir,
+                    "--json"]).stdout
+        utxo_report = json.loads(utxo)
+        assert_true(utxo_report["verdict"] == "UTXO_COMMITMENT_VERIFIED",
+                    "UTXO verifier failed synthetic genesis")
+
+        proof_path = tmp / "proof.json"
+        run([SCRIPTS / "prove-utxo.py", outpoint, "--datadir", datadir,
+             "--out", proof_path, "--json"])
+        proof_check = run([SCRIPTS / "verify-utxo-proof.py", proof_path,
+                           "--root", utxo_report["commitment"]["root"], "--json"]).stdout
+        proof_report = json.loads(proof_check)
+        assert_true(proof_report["verdict"] == "UTXO_PROOF_VERIFIED",
+                    "UTXO proof verifier rejected synthetic proof")
+
+        explorer_dir = tmp / "explorer"
+        run([SCRIPTS / "build-explorer.py", blk1, blk2, explorer_dir])
+        blocks = json.loads((explorer_dir / "blocks.json").read_text(encoding="ascii"))
+        assert_true(blocks["tipHeight"] == 0 and blocks["count"] == 1,
+                    "explorer did not build the synthetic chain")
+        index_html = (explorer_dir / "index.html").read_text(encoding="utf-8")
+        assert_true("innerHTML" not in index_html, "explorer viewer still uses innerHTML")
+
+        try:
+            chain.apply_blocks([genesis, genesis], strict_duplicates=True)
+        except chain.ParseError:
+            pass
+        else:
+            raise AssertionError("strict duplicate output mode did not fail")
+
+
+def run_golden_fixture(update):
+    blocks, meta = fixture_chain()
+
+    with tempfile.TemporaryDirectory(prefix="bitflash-tool-golden-") as tmp:
+        tmp = Path(tmp)
+        datadir = tmp / "datadir"
+        datadir.mkdir()
+        blk1 = datadir / "blk0001.dat"
+        blk2 = datadir / "blk0002.dat"
+        write_block_file(blk1, blocks[:2])
+        write_block_file(blk2, blocks[2:])
+
+        fair = run([SCRIPTS / "verify-fair-launch.py", "--datadir", datadir,
+                    "--max-blocks", "3", "--json"]).stdout.encode("ascii")
+        compare_golden("fair-launch-report.json", fair, update)
+        fair_report = json.loads(fair)
+        assert_true(fair_report["scanned"]["non_coinbase_transactions"] == 2,
+                    "fair-launch fixture did not count normal transactions")
+
+        utxo = run([SCRIPTS / "verify-utxo-set.py", "--datadir", datadir,
+                    "--include-utxos", "--strict-duplicates", "--json"]).stdout.encode("ascii")
+        compare_golden("utxo-report.json", utxo, update)
+        utxo_report = json.loads(utxo)
+        assert_true(utxo_report["stats"]["normal_transactions"] == 2,
+                    "UTXO fixture did not apply normal transactions")
+        assert_true(utxo_report["stats"]["total_fees_btf"] == "1.50000000",
+                    "UTXO fixture fee total changed")
+        assert_true(meta["genesis_outpoint"] not in utxo_report["utxos"],
+                    "spent genesis output still appears in the UTXO map")
+
+        proof_path = tmp / "fixture-proof.json"
+        proof = run([SCRIPTS / "prove-utxo.py", meta["proof_outpoint"],
+                     "--datadir", datadir, "--strict-duplicates",
+                     "--out", proof_path, "--json"]).stdout.encode("ascii")
+        compare_golden("utxo-proof.json", proof, update)
+
+        proof_check = run([SCRIPTS / "verify-utxo-proof.py", proof_path,
+                           "--root", utxo_report["commitment"]["root"], "--json"]).stdout.encode("ascii")
+        compare_golden("utxo-proof-verification.json", proof_check, update)
+        proof_report = json.loads(proof_check)
+        assert_true(proof_report["verdict"] == "UTXO_PROOF_VERIFIED",
+                    "fixture UTXO proof did not verify")
+
+        explorer_dir = tmp / "explorer"
+        run([SCRIPTS / "build-explorer.py", blk1, blk2, explorer_dir])
+        compare_golden("explorer-blocks.json",
+                       (explorer_dir / "blocks.json").read_bytes(), update)
+        detail = json.loads((explorer_dir / "block" / "1.json").read_text(encoding="ascii"))
+        assert_true(len(detail["txs"]) == 2,
+                    "explorer fixture block did not include the normal transaction")
+
+
+def main():
+    update = "--update-goldens" in sys.argv[1:]
+    run_genesis_smoke()
+    run_golden_fixture(update)
+    print("Bitflash script tool regressions passed")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())