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

Block 21575

Hash
000000a963ec9d43fddab36d00a4c18becb3df4207dccc97e929c99b33640e84
Confirmations
19918
Time
2026-10-13 00:23:17 UTC
Median time
2026-10-13 00:14:12 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
00d16bac8e339e43e60a8dd1c3f2f86b4d7a5fbf99b0a05449bcd7040253ae5e
Previous block
000000a0055835cb4798ae7da5c02a0686aeab0dbccdb81cb0ecdf4f840a11db
Next block
0000010412cc282fe4fee03fbe4c672efd2bb759456c0177ec7eddc5e67244b1

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 21575 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
e0f605975482cf6b61b0a05217a52f20… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
00d16bac8e33…d7040253ae5e coinbase1250