3 Pieces for Viola & Piano, Op. 26: No. 3. Polonaise

Recording identifiers

ISRC

DES808702423

Release date of the album this recording appears on

2015-07-01

CopyrightID (CopyrightChains transaction hash)

0x98666a357867e0d037ae1f12b8d5f9818271bf024676aada0b41c0a156d05e2b

Copyright registration time

2026-07-07T15:04:15+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:6bfa04bf893749529198d46d5e109236ae68783d13b1c28c9ee6585369108bdb

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DES808702423

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.