Modrej Len

Recording by Petr Rezek.

Recording identifiers

ISRC
CZA166900511
CopyrightID (CopyrightChains transaction hash)
0x4691e044327b50d7fe35b5b3f9e46a350291e7566fae8605e47fb99be5921807
Copyright registration time
2026-07-07T17:57:39+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:0b2ee38e803d931f5a5cb11e3816c1d7b7296ef93738acb3046306bf69e3b694

What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. 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.