PQ transparency · Algorand TestNet

Verify 402Signal’s history.

402Signal records commitments to its routing evidence in an append-only transparency log. Signed checkpoints are periodically anchored to Algorand TestNet using native Falcon-1024 authorization.

Routing never waits for blockchain confirmation.

Why this matters

Imagine your shopping agent spends $3 checking whether a used car is a good buy. Months later, you want to know which services it relied on.

402Signal’s transparency log creates a timestamped, tamper-evident record of the routing evidence it produced. The blockchain anchor makes it much harder for that historical record to be silently rewritten after the fact.

It doesn’t reveal your wallet or raw request, and it doesn’t prove an endpoint was truthful. It gives you a way to verify the history of the decision infrastructure your agent relied on.

The same idea applies when an agent compares paid news, buys a report, selects an API, purchases data, or pays for compute.

What did my agent rely on when it spent my money?

LOG SIZE

LAST ANCHORED

SINCE ANCHOR

Caught up

ANCHORS CONFIRMED

LATEST ANCHOR

2026-09-01 00:45:07 UTC

ROUTING EVIDENCE

Commitments

Commitments to what 402Signal observed and selected.

APPEND-ONLY LOG

Merkle history

A growing Merkle history that exposes later rewriting.

SIGNED CHECKPOINT

Ed25519 identity

402Signal signs the current Merkle root with its Ed25519 log identity.

ALGORAND TESTNET

Falcon-1024 / f1

The checkpoint is anchored using Falcon-1024 / f1 authorization.

Proof chain: routing evidence is committed to an append-only log; 402Signal signs a checkpoint of that log; the checkpoint is authorized on Algorand TestNet with Falcon-1024 (f1).

Latest confirmed checkpoint

Status

Confirmed

Tree size

Merkle root

965f6328251248ac5cd0260083a3b5cbc19e96f380a325213142207cc5391aab

Origin

402signal.com/pq/log

VERIFIED AT

2026-09-01 00:45:07 UTC

Block / round

66864432

Transaction

JZ3SX3HZ…5OXGMA

Authorization

Falcon-1024 (f1)

Falcon account

OBHYXCUV…34IFFIU

Amount

0 ALGO

View latest anchor on Pera View signed checkpoint for tree 13

What the transaction commits

Generic explorers may show unreadable text. 402Signal decodes the same 84-byte PQ1 layout.

Canonical PQ1 note. Reconstructed from the fields independently verified against the confirmed TestNet transaction.

FORMAT: 402sg/pq1:b
VERSION: 1
EXPECTED ORIGIN: 402signal.com/pq/log
ORIGIN HASH: SHA-256 of origin UTF-8: aa208d5acb233f32c76f8dced5005b3a5cdc474ba7f9268cf6c2e8bc3b2d422e · matches note origin-hash bytes
TREE SIZE: 13
MERKLE ROOT: 965f6328251248ac5cd0260083a3b5cbc19e96f380a325213142207cc5391aab
NOTE LENGTH: 84 bytes

TestNet explorers

View latest anchor on Pera (Pera Explorer, TestNet)
View Falcon account on Pera (Pera Explorer, TestNet). This is the configured Falcon-1024 account. Not every transaction on that account is a valid 402Signal checkpoint without PQ1 verification. First-party confirmed history is listed below.

Current vs anchored

Current tree 13 · confirmed tree 13 · unanchored growth 0.

The latest log checkpoint is anchored.

Anchor history

TOTAL CONFIRMED ANCHORS 3

TREE	Δ LEAVES	VERIFIED	BLOCK	TRANSACTION
13 · leaves 3–13	11	2026-09-01 00:45:07 UTC	66864432	JZ3SX3HZ…5OXGMA (Pera Explorer, TestNet)
2 · leaves 2–2	1	2026-09-01 00:29:55 UTC	66864093	7AQ6LFX5…5XBHWA (Pera Explorer, TestNet)
1 · leaves 1–1	1	2026-08-31 23:04:15 UTC	66862187	V2HBS4MP…PQDE4Q (Pera Explorer, TestNet)

TREE 13 · leaves 3–13

Δ LEAVES 11

VERIFIED 2026-09-01 00:45:07 UTC

BLOCK 66864432

TRANSACTION JZ3SX3HZ…5OXGMA (Pera Explorer, TestNet)

TREE 2 · leaves 2–2

Δ LEAVES 1

VERIFIED 2026-09-01 00:29:55 UTC

BLOCK 66864093

TRANSACTION 7AQ6LFX5…5XBHWA (Pera Explorer, TestNet)

TREE 1 · leaves 1–1

Δ LEAVES 1

VERIFIED 2026-08-31 23:04:15 UTC

BLOCK 66862187

TRANSACTION V2HBS4MP…PQDE4Q (Pera Explorer, TestNet)

Confirmed tree size at each confirmed time. The line joins those observations only.

Technical details

Authorization · Falcon-1024 · f1

Canonical PQ1 note · reconstructed from independently verified origin, tree size, and Merkle root.

Canonical PQ1 note · reconstructed (base64)

NDAyc2cvcHExOmIBqiCNWssjPzLHb43O1QBbOlzcR0un+SaM9sLovDstQi4AAAAAAAAADZZfYyglEkisXNAmAIOjtcvBnpbzgKMlITFCIHzFORqr

Canonical PQ1 note · reconstructed (hex)

34303273672f7071313a6201aa208d5acb233f32c76f8dced5005b3a5cdc474ba7f9268cf6c2e8bc3b2d422e000000000000000d965f6328251248ac5cd0260083a3b5cbc19e96f380a325213142207cc5391aab

Note length · 84 bytes

Origin hash · aa208d5acb233f32c76f8dced5005b3a5cdc474ba7f9268cf6c2e8bc3b2d422e

Signed checkpoint for confirmed tree 13: /pq/log/checkpoint/13

Latest signed checkpoint. It may be newer than the latest TestNet anchor. GET /pq/log/checkpoint

Public Ed25519 vkey

402signal.com/pq/log+1934981f+AbGEIOUhgnlhtmIwjItIEUgwL/5LyY7a3itADO3Zrl27

Public Falcon address (Algorand base32)

OBHYXCUV…34IFFIU

Txid · JZ3SX3HZ…5OXGMA

Confirmed round · 66864432

View raw TestNet transaction JSON (Algonode TestNet indexer)

What this proves

This anchor commits a specific log state to TestNet. Anyone can compare the signed checkpoint, Merkle root, and confirmed txn to detect later rewriting.

What this does not prove

It does not prove an endpoint claim was true. It is not a merchant payment.

402Signal recommends the route. The agent retains the wallet, signing, and seller payment.

It does not: let the blockchain prove endpoint correctness; make Base or Solana payments PQ-safe via Falcon; identify or authenticate a seller; or guarantee future endpoint behavior.

Verify yourself

GET /pq/log/checkpoint/13 (signed checkpoint for confirmed tree 13)
GET /pq/log/checkpoint. Latest signed checkpoint. It may be newer than the latest TestNet anchor.
C2SP tiles are published under /pq/log/tile/ (hash tiles and entry bundles). Compare them to the signed checkpoint.

Origin 402signal.com/pq/log
Tree size 13
Merkle root 965f6328251248ac5cd0260083a3b5cbc19e96f380a325213142207cc5391aab
Txid JZ3SX3HZ…5OXGMA
Public log vkey 402signal.com/pq/log+1934981f+AbGEIOUhgnlhtmIwjItIEUgwL/5LyY7a3itADO3Zrl27