String Quartet No. 3 "On Polish Folk Themes": II. Poco lento sostenuto

Recording identifiers

ISRC

PLA161728602

CopyrightID (CopyrightChains transaction hash)

0xfd50146c8bd41ff69afe50dd3ceaccc1f1cc13672fe19132311c59056066947b

Copyright registration time

2026-07-30T21:43:06+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T22:27:30Z

Bitcoin block

960321

Canonical record hash

sha256:b7b1979a048cf7e5f60839174e4681cce4537ac9e0848200f0812ae0a6252b12

• 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.