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

Block 21139

Hash
000000ee3c436d1a6565958161a6228f43f19736593ab5910c3e7bd82e821f18
Confirmations
19630
Time
2026-10-12 12:10:43 UTC
Median time
2026-10-12 12:01:57 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
157e298c92cf518c2fee138bc4b8f6e7958ef60e1be5b44c6be44ddf4fe41330
Previous block
00000032711ed445f22054a7a9f76ff113c0f7bea97f802051aed765a5f6259f
Next block
00000047355abb5c31ddd146a7ecb9304c7e647d77f9cc75982ad8164eb965f5

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 21139 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
fc9b4aa0aa0e4577f08cc77de4a161c6… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
157e298c92cf…4ddf4fe41330 coinbase1250