Prince Igor (Knyaz Igor), Act II: Ni sna ne otdikha

Recording identifiers

ISRC

USASX0736501

Release date of the album this recording appears on

2007-01-01

CopyrightID (CopyrightChains transaction hash)

0xc45fd7d75782508df5487b6da2ee80c9187f61133491abd4b32f2b1b3f8c8bb6

Copyright registration time

2026-07-31T11:12:54+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T12:24:41Z

Bitcoin block

960397

Canonical record hash

sha256:34555034d995d36525af1b83c69c296716d3c41fd7a865ca456ac580d8f5d3d0

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USASX0736501

What this proof establishes

This recording was released in 2007, 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.