Angel’s voices (25 Easy and Progress Studies for the Piano, Op. 100, No. 21)

Recording identifiers

ISRC

QZPLR2313172

Release date of the album this recording appears on

2023-08-10

CopyrightID (CopyrightChains transaction hash)

0xef686cfe1a0d46398fcb9d459b0e8e137c5fd08ec1549a2cd142ae9344076137

Copyright registration time

2026-07-31T21:41:15+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T22:27:44Z

Bitcoin block

960473

Canonical record hash

sha256:404c887231d2deaea9561043033b0b0157df49085cb1a33b5097a38d0f487cd8

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC QZPLR2313172

What this proof establishes

This recording was released in 2023. ProofProfile's artist catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and this recording entered the record through cc-db-prod's ISRC-linked registration. Its provenance rests on the dates stated above rather than on the era of that source corpus.

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.