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

Block 21917

Hash
000000c9e0ae5e0581b0ec1f77a70616113860eae87828b3241a4e53fdf056f8
Confirmations
19493
Time
2026-10-13 09:56:12 UTC
Median time
2026-10-13 09:47:31 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
75f5a3e9261961075f3d564ddb35b063b356506a7f447b484f26251417f2841e
Previous block
000000c1034735910267be81de6facc43995cdd6b7d7513bb0f3f5778a4221fa
Next block
0000007415217a39628317913317aba1cc4c620530a9b32f88df42f78fa83c74

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 21917 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
cd11497a1a620d6b0dca1768889fad94… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
75f5a3e92619…251417f2841e coinbase1250