String Quartet No. 2 in D, K.155: 1. Allegro

Recording identifiers

ISRC

NLA507000609

CopyrightID (CopyrightChains transaction hash)

0x27d7355630b59f3f8d0b05b9d23f6b06be1db7195a4516b2bb2f92e880f4c87c

Copyright registration time

2026-07-06T07:34:32+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-07T18:39:05Z

Bitcoin block

957073

Canonical record hash

sha256:fc106aabda8ed1fcefb0e70a5b48b78877df8ab1f752c5611361128f8398bb8f

• Verify the CopyrightID on CopyrightChains
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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.