Játékok, Book I: No. 1b, Prelude and Waltz in C

Recording identifiers

ISRC

NLE422203001

Release date of the album this recording appears on

2025-04-18

CopyrightID (CopyrightChains transaction hash)

0x7933fe67aacd9d1283b4c5d2ac4ad8ac87b7c509ea0c27454952f6a093124d45

Copyright registration time

2026-07-29T21:22:31+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-29T21:51:49Z

Bitcoin block

960150

Canonical record hash

sha256:24384772d2afab3747989cc5893e01c2b2182084ac039b33bc2c4dd0d754344d

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC NLE422203001

What this proof establishes

This recording was released in 2025. 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.