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

Block 19723

Hash
00000042f3d4fd033f68e271fe65deb0def661c62b91ea09c80657c5aaae14fa
Confirmations
22153
Time
2026-10-10 20:59:21 UTC
Median time
2026-10-10 20:50:41 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
5351f6a87cbad04dc175c9a7424d4666293fea466d7dd3fc2ef09dd801edc533
Previous block
0000010cf8189302e6e36bbf3a835257dbb2ef912f5b413220fded46978e0cc6
Next block
000000afdd72e517193c68df757c29e0766099eab4d2542948defa4cce84d698

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 19723 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
fe79b8ca5b74ab0ae0ad42b0ae174a6e… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
5351f6a87cba…9dd801edc533 coinbase1250