Musical Offering, BWV 1079: 4k. Canon a 4

Recording identifiers

ISRC

DEF057901007

CopyrightID (CopyrightChains transaction hash)

0x401b8b3a240e9a773d933c03bbe3e23c3cc6fde461d7ac574a0b782d0485e07d

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T18:48:12Z

Bitcoin block

960448

Canonical record hash

sha256:09dc746cae928dae6136b338830ddc0428da056fddb26c6ee5fd404c5a7ec990

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result

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.