Requiem, K. 626, III. Sequenz: VI. Lacrymosa dies illa

Recording identifiers

ISRC

FRZ149719080

Release date of the album this recording appears on

2009-11-03

CopyrightID (CopyrightChains transaction hash)

0xc6dd7ef9805d99d035d5b2b463e907fce6e0bdf2b1a1cdb89ce97753cf5d0e97

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T12:24:41Z

Bitcoin block

960397

Canonical record hash

sha256:bce046c03639bd3cdbbd06efc3f5adb738b282ae9fa07c46d84db6f668b8e034

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC FRZ149719080

What this proof establishes

This recording was released in 2009, 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.