Cardio

Recording identifiers

ISRC

NLK2U1600025

CopyrightID (CopyrightChains transaction hash)

0x1df7fe6f1ac44931b7a30f68e7f463fa6ee9eeb2d93f043392fcced5fa663084

Copyright registration time

2026-06-19T16:11:22+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:55:08Z

Bitcoin block

956304

Canonical record hash

sha256:1a231fe2d0b0f0f1adbee429c8dc4628ab649b765ebadd534415254c77504766

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result

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.