String Quartet No. 12 in B flat, K.172: 4. Allegro assai

Recording identifiers

ISRC

NLA507200608

CopyrightID (CopyrightChains transaction hash)

0xf1844d07b281075642c160a1c005e5e86b316dbb607e10149f07ce9a0c9c8514

Copyright registration time

2026-07-30T06:19:24+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T06:39:12Z

Bitcoin block

960216

Canonical record hash

sha256:43f725d2942c385f4e1093013f55f63d390b9e27df3b982f9235d5d369fb1ff1

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
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What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. ISRC is the stable recording-level bridge from that source corpus to the authoritative cc-db-prod track record.

CopyrightChains and Bitcoin OpenTimestamps make the exact committed record independently verifiable today. The cryptographic proof does not by itself establish authorship or ownership of the underlying recording.

Read the complete pre-generative-AI provenance and verification method.