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

Block 19003

Hash
000000cdc314c422adb7a76c2bed2ec995e2581999e3f4d54c51e3abed8ae4be
Confirmations
21329
Time
2026-10-10 00:44:33 UTC
Median time
2026-10-10 00:36:11 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
7e3c393b4e07fa687f21e3e170ac5787b895d407fcc8b70cfdfaca18f10db3bf
Previous block
0000001a82f70369747940fa1c855b25c3319ced4c8a1c40677355f59747c1cf
Next block
000000a078c5ecccdd7cec85e6a9f567bb5cff442e5c32e09a0df6481bd393ba

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 19003 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
279eac0c776ac7118d65b3c8cd01df00… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
7e3c393b4e07…ca18f10db3bf coinbase1250