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

Block 21568

Hash
000000677bc794dcdd25fa612ec0a25e9ce14246813da417ef3c77adf089a9dc
Confirmations
19575
Time
2026-10-13 00:10:58 UTC
Median time
2026-10-13 00:03:03 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
015cb8af5389756fdb78e087897b58a980f422aabf1986845537b54c27702187
Previous block
000000a50799d43fe2bdef0ecba33a4859cd2d68103bd675ae760619f1f4574e
Next block
000000e04ef2875da4f83b8fd4339d1bdedc24597c70263e70cab11b6eeb0ae3

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 21568 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
939de8ea85e92034aa2e25d23157272c… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
015cb8af5389…b54c27702187 coinbase1250