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

Block 21431

Hash
00000016022b42373153451a2e3f89890b42e5e378cff058209a2fccf12ae07a
Confirmations
20540
Time
2026-10-12 20:23:37 UTC
Median time
2026-10-12 20:15:00 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
e1945346271d013ddf422fedf9fc16526d29a3fbc8bc95fe620275bf35dedcc9
Previous block
000000d210cddb5265e7784af5db18ae3c7551eaab1df29af97ecbb81c0fea53
Next block
0000009bd7777c83f7832a52b3f83bf2c5ac9c85d6563cc9936683f7555602ad

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 21431 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
86d0bbf2c5a4aa2bcb28ee8357c2f526… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
e1945346271d…75bf35dedcc9 coinbase1250