ISRC USSM19701941
Verified recording
USSM19701941 is “Concerto No. 4 for Guitar and Orchestra - Dedicated to John Williams "Concerto de Toronto": II. Theme and Variation - Theme” by Leo Brouwer,
registered on the CopyrightChains blockchain with CopyrightID
0xb19d7e12f2a0bd43317cb5163dfd40c57b5d37f8dc630d20a70e481f98da97b7 and independently timestamped
in Bitcoin block 957118 on 2026-07-08.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19701941.
Recording identifiers
- ISRC
- USSM19701941
- Title
- Concerto No. 4 for Guitar and Orchestra - Dedicated to John Williams "Concerto de Toronto": II. Theme and Variation - Theme
- Artist
- Leo Brouwer
- CopyrightID (CopyrightChains transaction hash)
0xb19d7e12f2a0bd43317cb5163dfd40c57b5d37f8dc630d20a70e481f98da97b7
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:20:19+00:00
- Bitcoin block
- 957118
- Canonical record hash
sha256:46c3c2803661924c835cfae4027ae107ac38f8ccf74bcde0376547cf11de7319- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19701941
- Bitcoin block existence check
- https://blockstream.info/api/block/957118
Full record
Track page: Concerto No. 4 for Guitar and Orchestra - Dedicated to John Williams "Concerto de Toronto": II. Theme and Variation - Theme · Machine-readable JSON-LD