Piano Sonata No. 2 in B-Flat Minor, Op. 35: III. Marche funebre. Lento

Recording identifiers

ISRC

USBC19800521

Release date of the album this recording appears on

2025-04-20

CopyrightID (CopyrightChains transaction hash)

0x95e2b9be1bcb8dc593af8064b2f107a49997e92c3e728bad93d0b1bf25952820

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T07:28:30Z

Bitcoin block

960220

Canonical record hash

sha256:eb2bd37563bbb20ebc76293be27cde6b6c66394cd7d5823b5e0744ff398235f8

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USBC19800521

What this proof establishes

This recording was released in 2025. ProofProfile's artist catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and this recording entered the record through cc-db-prod's ISRC-linked registration. Its provenance rests on the dates stated above rather than on the era of that source corpus.

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.