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

Block 21722

Hash
0000011cae26e93ef1cb3ab40dd807c5a32238009082c6bfcac86ea0adba125e
Confirmations
19782
Time
2026-10-13 04:30:52 UTC
Median time
2026-10-13 04:22:47 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
680c29c6bf6a6b7abd89159ca121aa94e2783be7672a0ca70d6cb01af2bd67de
Previous block
00000017692f32bcb2765e199ef7aa6ed4a598948c116a727ef81ce5896191fa
Next block
000000f9bdf1b4058a55d36b86c34410e20595ab4dd3cc041c24037e544256c3

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 21722 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
470d0fca3b5cc37d084f349944aa4dc9… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
680c29c6bf6a…b01af2bd67de coinbase1250