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

Block 21683

Hash
0000006df084c220c80328947e29e50588d94421fced28f561319ba23e07ee8b
Confirmations
19450
Time
2026-10-13 03:26:29 UTC
Median time
2026-10-13 03:18:28 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
37ad3e2b5bd5c588289d3c5b2118d7ef17e036693b8649204229cb00816a478a
Previous block
000000cbd13217b6170b2c1e56bd9146e81aa7521f1281758ccdc7b642051fd2
Next block
00000053391fa3da1c09f7445730e6e5b54cb0000d4ccc7626d05073e4678629

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 21683 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
fa1f56ca49261c4aea1947bfd9c52d37… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
37ad3e2b5bd5…cb00816a478a coinbase1250