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

Block 21975

Hash
0000007f8b8feca40659a24d685bb47a3622955a8f9f26a26c46cc0d0d46384c
Confirmations
18599
Time
2026-10-13 11:33:08 UTC
Median time
2026-10-13 11:24:59 UTC
Transactions
2
Size
2,977
Weight
11,596
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
9b0a4a9e4ca63865940fe538734b87c5559d2d5bee20b5e971005a910b342f4a
Previous block
0000001c91796aa7b7b130aac4afac34a7e30156275aea52836fddb0e92ba041
Next block
000000ad63cec12f438f67b660d28dec8b99bb64808b3ab5f34e40d2a11fddaa

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 21975 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
a02068510dbd67098f09a4fefecd6cd7… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
983335e1448b…b4b0af56fc01 coinbase1250.0000031
c56af883f00c…05e55f1d4964 pays to P2MR1218.99990060.0000031