String Quartet No. 12 in B flat, K.172: 1. Allegro spiritoso

Recording identifiers

ISRC

NLA507200605

Release date of the album this recording appears on

1986-01-01

CopyrightID (CopyrightChains transaction hash)

0x7fbc096923001c536bec25e5bd163d879a1bfd56b9a400e0906426eae34e3874

Copyright registration time

2026-07-29T23:47:12+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-29T23:52:38Z

Bitcoin block

960170

Canonical record hash

sha256:99618319da6ab9882d1449b64c2b2f002f88453ac33623d4e550bbf488d25362

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLA507200605

What this proof establishes

This recording was released in 1986, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and 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.