Requiem, K. 626: IIIa. Dies irae - Recorded 1975

Recording identifiers

ISRC

DEF057530004

Release date of the album this recording appears on

2007-01-01

CopyrightID (CopyrightChains transaction hash)

0xbd90ddd6c481a8bea94218b55013deaf86f2db03271e5150237b3018a419a7f5

Copyright registration time

2026-06-25T19:24:34+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-07T13:52:39Z

Bitcoin block

957043

Canonical record hash

sha256:9e0824744854c873f8d201bd8d5d0b71da38a6db20191b797c22d17709220395

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC DEF057530004

What this proof establishes

This recording was released in 2007, 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.