Etude for Piano: Guero (1970)

Recording identifiers

ISRC

SEWDL0724804

Release date of the album this recording appears on

2005-09-15

CopyrightID (CopyrightChains transaction hash)

0xbb2e3218161ef4e0e5cc59e40b0d2b0a3438a29c46ca932ca6eb13244fce5798

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T18:23:33Z

Bitcoin block

960291

Canonical record hash

sha256:dfe18a4b9910e9de5bff461ba8ad67f6d85d69f83fea0443545babf6a380f10f

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC SEWDL0724804

What this proof establishes

This recording was released in 2005, 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.