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

Block 18003

Hash
0000008191bf8d674ed72b3f8661cde16d7f178ced4069253f01b4a3681066dc
Confirmations
24161
Time
2026-10-08 20:53:10 UTC
Median time
2026-10-08 20:45:16 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0040172004
Bits
1e00f8ed
Merkle root
21340575b95bf5cec7c31a1dea4207533c924d4ff8ae04236f936992a1112fb6
Previous block
000000076c8f4de85a978128aa7c0bdeb2cea5923461a1671c7fb7a064d1d273
Next block
000000d7764bd74ad879ae5b8875f6830f47def36500c523d9561c380e306bc4

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 18003 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
c7f700095face24671f3cb536a12008e… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
21340575b95b…6992a1112fb6 coinbase1250