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

Block 19225

Hash
00000063443ad347dc802429774f534d5819ab71e1881e86bd437ba9bd436a41
Confirmations
22860
Time
2026-10-10 07:03:24 UTC
Median time
2026-10-10 06:54:26 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
25aeda7231751deac5cd4091630332b8e41698230fa6dcfe453dd694b2eb97f5
Previous block
0000010ccd90d71d09bf39eaffdc3296334bc1136b2b8f3540c2a7f6cd6bceb3
Next block
000000e33e90810d79aa2a728ee4db9b7f5d65171ffc9fccd5251c7065cf200c

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 19225 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
add8a0bde8e710a720db47ba711b3daa… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
25aeda723175…d694b2eb97f5 coinbase1250