2026-09-30: anchored on Base mainnet.
40,104,103 rows of DEBYKO's history of 2026-09-30 UTC, in 9 tables, under one root stored in the contract under the key 20260930.
The anchor proves the data did not change after the anchor time; it proves nothing about its correctness at collection. The root below is what the chain holds for this day: check it there, not here.
The 9 tables under the root.
Each table's rows of the day form one Merkle tree (RFC 6962); each tree's root, with its table, day, row count and schema version, is one leaf of the day's tree, in table-name order. Chunks are the 4,096-row pieces a proof is read from.
| Table | Layer | Rows | Chunks | Partition root |
|---|---|---|---|---|
| candle | candles | 1,612,960 | 394 | bed16e34d3923e60644ac78aaca24012ad5904cd22842802692ebabf982cd642 |
| liquidation | liquidation | 1,764 | 1 | 8b1189c99b821e102d7a32feae7615ce0772f35c87e6b6940f6c9f3e4fb88af0 |
| observation_depth_derived | book | 1,046,410 | 256 | 0424687fb353705999b3dc6de2f557d53ea452796b1fd4bba4dbaff54b0c10ae |
| observation_funding | funding | 559,916 | 137 | a95d366de8c3504d14f401aa95a9bd0b6ad9341a8cdd7349196288ff9de0da32 |
| observation_mark | mark | 1,245,059 | 304 | bbdc712c8220cbdcdada9ba44873249de25bc298be06805cd7aee31b5c295f5b |
| observation_open_interest | oi | 1,195,551 | 292 | 88d8121664fbd2f97cc16a887906be806da7bf3b68e80d44250b4e1b279f0cc8 |
| observation_stats | stats | 1,110,629 | 272 | 2c49da669d17d585d1260749590b10924a39c95b30c4172c8d3633fc29a8accf |
| observation_ticker | ticker | 1,485,055 | 363 | ff0eb721617098b964519fe1b535d7105a4dc7ded6b8a7a976157bde5fa56129 |
| trade | trade | 31,846,759 | 7,776 | a568d789e13350f71b751f4f47a038772de24defba86ae90723cdea1f24fa212 |
Check this day without trusting DEBYKO.
The same steps as docs.debyko.com/attest/verify, with this day's values filled in. The first asks the chain alone; the others prove one row of the day under the root it returns. Any public Base RPC does in place of https://mainnet.base.org. Or let your browser do all four for that row: verify it here.
The root on the chain
roots(uint32) of the contract, with the key 20260930. With Foundry, or with curl alone; the answer is the root, 0x793d6b654a…6de60a.
cast call 0x0AF8259DBfC613825718d4d49A05F9F6fdA15086 "roots(uint32)(bytes32)" 20260930 --rpc-url https://mainnet.base.org
curl -s https://mainnet.base.org -H 'content-type: application/json' \
-d '{"jsonrpc":"2.0","id":1,"method":"eth_call","params":[{"to":"0x0AF8259DBfC613825718d4d49A05F9F6fdA15086","data":"0x081dc6810000000000000000000000000000000000000000000000000000000001352842"},"latest"]}'What DEBYKO says about it
The day's root and its partitions from the API, without a key: it must be the root the chain returned.
curl -s https://api.debyko.com/v2/anchors/2026-09-30The proof of one row
Any stored row of the day, by its listing, layer and own time. Proofs need no account and no key (30 a minute and 2,000 a day from one address). This one is BTCUSDT's 12:00 trade candle on BINANCE-USDM.
curl -s "https://api.debyko.com/v2/anchors/proof?venue=BINANCE-USDM&symbol=BTCUSDT&layer=candles&at=2026-09-30T12:00:00Z&tie=trade" > proof.jsonThe row under the chain's root
verify.py from github.com/debyko/verify (one file, the standard library only, MIT) hashes the row, walks both paths and reads the root from the contract: ✓ valid, or ✗ and the step that failed.
curl -sO https://raw.githubusercontent.com/debyko/verify/main/verify.py
python3 verify.py proof.json --rpc https://mainnet.base.org --contract 0x0AF8259DBfC613825718d4d49A05F9F6fdA15086All anchored days, with their roots.
The next day is 2026-10-01. The day before is 2026-09-29. The list carries every day's status, transaction and rows per table.
The contract and its transactions.
DebykoAnchor's verified source, every Anchored event and the transaction of this day, on BaseScan.