Concerto for Piano and Orchestra: IV. Quarter Note = 84 - Presto

Recording by Witold Lutosławski.

Recording identifiers

ISRC
DEN961305014
CopyrightID (CopyrightChains transaction hash)
0xb68badddb32fea0af61491587545558ec90f556d0ec77d9304ceef340ad80bd7
Copyright registration time
2026-07-07T07:13:16+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:f773693604ddbbe781b0c045a9bde07f8662ab6315229007d097384caa147eb6

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.