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

Block 21784

Hash
00000056e1712d2bafdf477ee1675e6dfbf64328c49a2607baaf27a38f684be0
Confirmations
19654
Time
2026-10-13 06:15:24 UTC
Median time
2026-10-13 06:06:56 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
4d2db24eb92e781850ca687d67358dff9fb4d63dfb55cfff99b877fcd24846ad
Previous block
00000068bd8de149a2f47db078b305d6906d8af5187370e7c6638641ae5cc034
Next block
000000c30126bae2e025d525c088019f5994c58eb67747bb801dba8f0154a90a

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 21784 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
f90a3c89e2f4982126f4b8fd0a6027ef… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
4d2db24eb92e…77fcd24846ad coinbase1250