Frevo Rasgado - Live at Warfield Theatre, San Francisco, CA - December 5, 1980

Recording identifiers

ISRC

USSM18000197

Release date of the album this recording appears on

1981

CopyrightID (CopyrightChains transaction hash)

0xeffdae6bebbab4b7f047ab305e1a51e0b1812cf0c196c78b48f5cfb7848ce32e

Copyright registration time

2026-06-07T01:32:19+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-06-13T12:53:06Z

Bitcoin block

953515

Canonical record hash

sha256:910b763ea4ffe518528e29a651d182bc666ddd5dffd6924d1b955d313ade9995

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC USSM18000197

What this proof establishes

This recording was released in 1981, 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.