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

Block 21648

Hash
00000073f749e1de86d637c390bf7436a8495620baf42383d2a7e5524898720c
Confirmations
20510
Time
2026-10-13 02:27:20 UTC
Median time
2026-10-13 02:19:25 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
ee843658a9f237c1a1ee5fb0eac34286383da2358d9a965381affd88b8dcf41b
Previous block
0000009baba32b6e72620bb57463621d8b54fad1cea56d3004904ad718e0e87b
Next block
000000a2cc2ab1d5b71bdc27e97066438320fa5825dc30e079f6e3dcf59b58ec

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 21648 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
ae262cbf4ffea658d67253681bcda268… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
ee843658a9f2…fd88b8dcf41b coinbase1250