Waltzes, Op. 69: No. 1, Lento in A-Flat Major

Recording identifiers

ISRC

GBAYC8903089

Release date of the album this recording appears on

2021-11-27

CopyrightID (CopyrightChains transaction hash)

0x8a72f75cd0ad51b7e68db3520b27cc50eb6dc16b8dad3a9b9b7280d3637b65e7

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T22:27:30Z

Bitcoin block

960321

Canonical record hash

sha256:a0254e704f5439958fc08e648fbf47d03f7f8e393ccc21b8f994f9d1b1b00661

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC GBAYC8903089

What this proof establishes

This recording was released in 2021, 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.