Porgy And Bess: Leavin' for the Promise' Lan'

Recording identifiers

ISRC

USBC17600307

Release date of the album this recording appears on

1977

CopyrightID (CopyrightChains transaction hash)

0x75e9a8d642a57eb8a7e23009ff7d991ad7f9792af0fdc5785c0f5b352c88f646

Copyright registration time

2026-07-30T22:10:36+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T22:27:30Z

Bitcoin block

960321

Canonical record hash

sha256:7c30a4af56ebcb7c964e7fba57fb8eff60540c6fc698f6b963cafd37aaf1fbba

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USBC17600307

What this proof establishes

This recording was released in 1977, 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.