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

Block 19188

Hash
0000009f13a8fe5dd8c8459c146176ac18f3caf169fa8acca4b6e484897f23a7
Confirmations
22694
Time
2026-10-10 05:59:59 UTC
Median time
2026-10-10 05:51:09 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
843d2c25c4b35a106d54ddf1449186f072a51a4dd36d0c54e91e005c5b189d9d
Previous block
000000471b3127bfaff67c486d68db751c99f2ecc28c4e679db88d2f65535cf6
Next block
00000040ea9c80561f4c85f3bc9a27a48fb3abfada47342c1bce1494df2a360f

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 19188 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
8a32b6de10f4db0956031930267a9a59… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
843d2c25c4b3…005c5b189d9d coinbase1250