Off the Books (feat. Big Pun & Cuban Link)

Recording identifiers

ISRC

USLR50100114

CopyrightID (CopyrightChains transaction hash)

0xa9c992a47be87635e9c3941c2d9de40eaa0c984f04a10d11f9f364d48192a728

Copyright registration time

2026-06-04T08:11:34+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:20:19Z

Bitcoin block

957118

Canonical record hash

sha256:e13682887b4a96b9501b92ae78204b01482b0501a0b584ab584a8b42718a3b20

• 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.