Variationen für Klavier, Op. 27: No. 1, Sehr mässig

Recording by Anton Webern.

Recording identifiers

ISRC
DEBL61401295
Release date of the album this recording appears on
2015-02-13
CopyrightID (CopyrightChains transaction hash)
0xc10e3bb141b5d441d2f41d346ce76f7bc491641aec7ca0b8f8f801fcfad4b3dc
Copyright registration time
2026-07-07T00:23:25+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:6405b99e61f8259b6b0cd262be8a96f7b9ef1a3a664e8f18733a126ba0316660

What this proof establishes

This recording was released in 2015, 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.