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

Block 21661

Hash
0000009ee410126c116a835d5ccbaa397eda74a6aadf1c3e4b7059cf9a939a14
Confirmations
20448
Time
2026-10-13 02:49:54 UTC
Median time
2026-10-13 02:40:59 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
1565b2290c5d1952580f0e3e04c9ddcbd0acb44b4ed63424b1494102f92588cc
Previous block
0000004e7db0f1b01faa3dada23f5eae645ccaa4879fab5c4b5746e47e84b1e9
Next block
00000018e5124e85874480df10a5ab30fd683363c42b267b73c9ae1a3a82aabb

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 21661 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
231c60d704f9ec563fc00fa12277221e… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
1565b2290c5d…4102f92588cc coinbase1250