The Trust Proof

This notebook reconstructs the entire AnchorRegistry from on-chain events alone.

No AnchorRegistry API. No Supabase. No account. Just an RPC endpoint and the contract address. If AnchorRegistry’s servers disappeared tomorrow, this notebook would still work.

These examples run against Sepolia testnet (network="sepolia"). To run against Base mainnet: replace configure(network="sepolia") with configure(network="base"). All function calls, record structures, and output shapes are identical across networks.

# Cell 1 — what you need
# - An Ethereum RPC endpoint (Infura, Alchemy, or your own node)
# - The contract address (public on Etherscan forever)
# Nothing else.

from anchorregistry import configure, get_all, to_dataframe, BASE_SEPOLIA_RPC, V1A_BASE_SEPOLIA
from anchorregistry.constants import CONTRACT_ADDRESS, DEPLOY_BLOCK, RPC_URL

configure(
    network="base-sepolia",
    contract_address=V1A_BASE_SEPOLIA,
    rpc_url=BASE_SEPOLIA_RPC,  # swap for Infura / Alchemy URL for faster scans
)
print(f"Contract:            {CONTRACT_ADDRESS}")
print(f"Scanning from block: {DEPLOY_BLOCK}")
print(f"RPC endpoint:        {RPC_URL}")

Contract:            TBD
Scanning from block: None

# Cell 2 — reconstruct the full registry
records = get_all()
print(f"Total anchors recovered: {len(records)}")

Total anchors recovered: 5

# Cell 3 — inspect a single record (raw dict)
records[0]

{'ar_id': 'AR-2026-dPXazj6',
 'registered': True,
 'artifact_type_index': 1,
 'artifact_type_name': 'RESEARCH',
 'tx': '0x826f623ce984a9cadeb5d72c710d279e7385cd83ee4815d092e393d5d574ec57',
 'block': 40225238,
 'registrant': '0xc7a7afde1177fbf0bb265ea5a616d1b8d7ed8c44',
 'manifest_hash': '981e16e83f1e0068d87a89e04962b9287bb5f024782beca6fec837304e8c308e',
 'parent_ar_id': '',
 'descriptor': '',
 'title': 'test sepolia anchor',
 'author': '',
 'tree_id': '0xf07140ce4deaf3b5dac859091a079f82e9656f173593feda7895d940b8fa5d13',
 'token_commitment': '0xf07140ce4deaf3b5dac859091a079f82e9656f173593feda7895d940b8fa5d13',
 'data': {'doi': '',
  'institution': '',
  'co_authors': '',
  'url': 'https://anchorregistry.com/'}}

# Cell 4 — load into DataFrame
df = to_dataframe(records)
df.head()

	ar_id	registered	artifact_type_index	artifact_type_name	tx	block	registrant	manifest_hash	parent_ar_id	descriptor	...	data_data_version	data_format	data_row_count	data_schema_url	data_url	code_git_hash	code_license	code_language	code_version	code_url
0	AR-2026-dPXazj6	True	1	RESEARCH	0x826f623ce984a9cadeb5d72c710d279e7385cd83ee48...	40225238	0xc7a7afde1177fbf0bb265ea5a616d1b8d7ed8c44	981e16e83f1e0068d87a89e04962b9287bb5f024782bec...			...	NaN	NaN	NaN	NaN	NaN	NaN	NaN	NaN	NaN	NaN
1	AR-2026-86pNXz1	True	2	DATA	0xb050ffe1e882221230d5d2d7c5f68a2eaab9309c065f...	40225277	0xc7a7afde1177fbf0bb265ea5a616d1b8d7ed8c44	e4fde52cce29d5efc0cd0d4a076d410e568937d7d2007f...	AR-2026-dPXazj6		...					https://anchorregistry.com/	NaN	NaN	NaN	NaN	NaN
2	AR-2026-yPZBgoP	True	0	CODE	0x4935e22226509ac7bba092a15f01646d252b22ffe242...	40253950	0xc7a7afde1177fbf0bb265ea5a616d1b8d7ed8c44	7befa395c06769bdaf5ddfd3e94a3f79ac6ff67a367dfd...			...	NaN	NaN	NaN	NaN	NaN
3	AR-2026-A5kgam5	True	0	CODE	0x01c336d30186a283a767d1830bdaf2a8ccecd52142db...	40254559	0xc7a7afde1177fbf0bb265ea5a616d1b8d7ed8c44	40a11cdd88c0df54d1be354dc54e927360376e6080ab76...			...	NaN	NaN	NaN	NaN	NaN
4	AR-2026-L5RMQQ6	True	0	CODE	0x9532d06aaa4d802b09a387531116641436f42743e4dd...	40254684	0xc7a7afde1177fbf0bb265ea5a616d1b8d7ed8c44	19b09e8ff3e6ae46cfd3c98bc9983ee89d4c319cf4538b...			...	NaN	NaN	NaN	NaN	NaN

5 rows × 28 columns

# Cell 5 — explore the registry by artifact type
df.groupby("artifact_type_name").size().sort_values(ascending=False)

artifact_type_name
CODE        3
DATA        1
RESEARCH    1
dtype: int64

# Cell 6 — reconstruct a specific tree
from anchorregistry import get_by_tree

tree = get_by_tree("0xf07140ce4deaf3b5dac859091a079f82e9656f173593feda7895d940b8fa5d13")
for anchor in tree:
    indent = "  " * (1 if anchor["parent_ar_id"] else 0)
    print(f"{indent}{anchor['ar_id']} — {anchor['artifact_type_name']} — {anchor['title']}")

AR-2026-dPXazj6 — RESEARCH — test sepolia anchor

# Cell 7 — verify a specific artifact
from anchorregistry import verify

result = verify("AR-2026-dPXazj6")
print(f"Registered:    {result['registered']}")
print(f"Manifest hash: {result['manifest_hash']}")

Registered:    True
Manifest hash: 981e16e83f1e0068d87a89e04962b9287bb5f024782beca6fec837304e8c308e

---

The output above was generated entirely from public Base event logs.

The contract address is permanent. The deploy block is documented. Any RPC endpoint works. The registry cannot be suppressed.