Jednoho dne se vrátí (Once Upon a Time/Jour tu reviendras)

Recording identifiers

ISRC

CZA231100078

Release date of the album this recording appears on

2012-01-13

CopyrightID (CopyrightChains transaction hash)

0x99689c1939d430fa941b573f182f57a32c8a9d3556f2c451027daebb7eda4af7

Copyright registration time

2026-06-25T19:11:53+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:55:08Z

Bitcoin block

956304

Canonical record hash

sha256:da5a9383442deb7cee6a072c65d3943890ece27ffd9b49fbb9d46d4a72a30964

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC CZA231100078

What this proof establishes

This recording was released in 2012, 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.