ハイドンの主題による変奏曲 作品56a　変奏II

Recording identifiers

ISRC

JPP301800187

CopyrightID (CopyrightChains transaction hash)

0xf1b790e0ff2e120485e019a0f7781ecac445160d2edbd2ca57c0308b9e1bcbc4

Copyright registration time

2026-07-31T19:40:15+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T19:53:13Z

Bitcoin block

960455

Canonical record hash

sha256:7a69497dc9ec71266a85ddd7ec3edd1ec66d12d6f3ce1ce4856870eb0518d390

• 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.