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

Block 18819

Hash
0000004bac63d03f306bb26125e36905231fb12bf6a2e092e06574e2942e3350
Confirmations
23619
Time
2026-10-09 19:35:21 UTC
Median time
2026-10-09 19:26:54 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
0f0411c4be2b0c2c77cabab6231cab850fce6eeb5a41b5610581346f70beb2b5
Previous block
000000046186dab6886b7976e30488db4953212c82c920e28e538f1fdadec3fb
Next block
000000306267c8e6d84455f61e04d1960f0f3f291efd888054fa737d951b69f8

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 18819 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
42a8148d83ad27d86e14648e61be1e87… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
0f0411c4be2b…346f70beb2b5 coinbase1250