Improvisation On Morton Feldman String Quartet No. 2, 3rd Movement

Recording identifiers

ISRC

GBHLW2103280

CopyrightID (CopyrightChains transaction hash)

0xc0cc54662acb2b8eb2b80debba8cc7cb8200d9ea5225d7195ab077dd92a27672

Copyright registration time

2026-07-06T20:36:12+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:31d4975d89e27d9c3a04a4725c54a63f1a1f7bdb086613d435e9e34f81f42876

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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.