Killing Floor - Live 10/10/68 Winterland, San Francisco, CA

Recording identifiers

ISRC

USQX91100760

CopyrightID (CopyrightChains transaction hash)

0x2c950d0366686ee275d6be589c3e4c9ae999d62dc8b7e5ba5f1aa2412a2418b1

Copyright registration time

2026-06-19T21:49:49+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:30:09Z

Bitcoin block

956302

Canonical record hash

sha256:88bf145a902c88894eca2358ae3d04fe7edf52fae94e230b37f6efb0ad9d18d8

• 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.