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

Block 21912

Hash
000000517d45d0625f227ffc5641045461861bcf570a173c183b0529e2e94776
Confirmations
19638
Time
2026-10-13 09:47:31 UTC
Median time
2026-10-13 09:38:29 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
b9ab8ef63046e3b84537c8894dd8d575bdc920dd7d173571f6879e1f96b0bedb
Previous block
0000012778da8b5108fe1c55f1928f8e39521bb3efddb509bc8e63fe47a4c473
Next block
00000101bf64ca0fcce5cf3331cafa4411767f68762c31d5fb9f890ed4b74b47

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 21912 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
1c124cc9143bf600c94b4d29970687f4… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b9ab8ef63046…9e1f96b0bedb coinbase1250