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

Block 21563

Hash
0000007005822b24f6edf0ca95a91e3e169c36a5b0380e435c15418551a2430a
Confirmations
19228
Time
2026-10-13 00:03:03 UTC
Median time
2026-10-12 23:55:03 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
38f79c21594cec815bbf99f054c20efa0673502ee0f06020ada5894198e3922a
Previous block
0000005714d28e62251b2bd4a8a80b6987458db00166ed344dadc6e5bba9fcf7
Next block
0000005f3d3e9d08472f57fe4fecab11cd92a32cf8ddd2e333b12a150cfcfaee

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 21563 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
744d4c83cd76e9edb7f0adcbac02d2e7… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
38f79c21594c…894198e3922a coinbase1250