Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 21775

Hash
000000aca0344b18573953b62eaa5418c5d8d5838b7610bd1ca5959e36d4f947
Confirmations
19280
Time
2026-10-13 06:00:23 UTC
Median time
2026-10-13 05:50:57 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
343830f8bd8e130fa898c3c844a895466062d55f2552bc1be3cd53bb9df0cf26
Previous block
00000033a35bac53eb589d852df21d905db5f815c9c11a58023d086b078b37c7
Next block
0000011232c266d2bb844a129e2b0e471d78cc3747750f12d847059f76974d40

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 21775 is at or above the activation height 20000: nodes that enforce M2 accept a block there only with a valid ML-DSA-44 block signature.

The node behind this site enforces M2 and holds this block, so its block signature passed the node's check.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
28c9a9f9d872971041d45b68756df80b… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
343830f8bd8e…53bb9df0cf26 coinbase1250