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

Block 19537

Hash
000000c13ae4cea63c4738db723650d3d465a846ef9b661848fd34ffbdb4fcae
Confirmations
21931
Time
2026-10-10 15:45:28 UTC
Median time
2026-10-10 15:36:58 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
878d043d21e15ac6ffd2197e1632f9f7a5c205e79b6255c579b3401e9fb74967
Previous block
0000000f47c77a1b591aa591a0f9b92fec4e814d47c5e61480f2f4dcd207a33c
Next block
00000030067eeb3b4f91f270bad208736a883d4c36cc844f3a46f1c6cf6e59ee

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 19537 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
2d9829329de7fb10635c00d6efe1e8be… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
878d043d21e1…401e9fb74967 coinbase1250