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

Block 21801

Hash
0000000cb504dabc4087dfd52c1138cbb45e55be55c1023937969506b79365fa
Confirmations
20313
Time
2026-10-13 06:43:04 UTC
Median time
2026-10-13 06:34:51 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
257be2ae99c31ea37bea68dfdcc2ba1dff2d7f03345f64daf1adc62bb83beabb
Previous block
0000011198520579375deb7767269898b351a0efc72a68b6a5dde0cbbcefac2c
Next block
000000e8d63af298050c5ff1e54eb426b8d90e411d9aabea316ce52b1a3d3f1a

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 21801 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
4581c02e0f10b6d88fc951e88e5e5005… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
257be2ae99c3…c62bb83beabb coinbase1250