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

Block 19444

Hash
000000d6f4f82f80fb3520aa695ebf1a148bc57da0018638e420cd28d75ae5a0
Confirmations
21601
Time
2026-10-10 13:10:12 UTC
Median time
2026-10-10 13:02:13 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
36ac50257ab0a1e8317120964bdcc1a0aa4c2ac68c281ea7e836246002664e05
Previous block
0000008e8bf31e258caf66aabb77a826dd6014863bb36c164cbeb81f5440a37f
Next block
000000566be403e0b135a822ce1e9c699a5615bc527893d617fe9ce92c9bc5d0

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 19444 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
ffc6b0d0d347bc2ea8b01e153a5db6fb… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
36ac50257ab0…246002664e05 coinbase1250