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

Block 21513

Hash
0000010a2e574875843ce73c2afb52452f1ed8828b52ff96b6f6c8a6f42c6603
Confirmations
20010
Time
2026-10-12 22:39:45 UTC
Median time
2026-10-12 22:31:41 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
6d078f63b53d914303d320371631388b1659665c36b373c7f46dbff484e0a64e
Previous block
00000124c73bf8af700ca8b07e200ee41b29f0f2157d3af6ca6168e952da96fe
Next block
0000002481a2f53b11136ce821e3133c7bba68305f24d3cf7f2a0de1b04477f9

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 21513 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
527bfdfbd3c802f3c525820af2d07cca… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
6d078f63b53d…bff484e0a64e coinbase1250