ISRC DEF059604421
Verified recording
DEF059604421 is “String Quartet 1931: 1. Rubato assai” by Ruth Crawford Seeger,
registered on the CopyrightChains blockchain with CopyrightID
0xa2f8c5e1f12e323e20b72704eec8d2e90d067a8c88ac5184e480e04c619dbf62 and independently timestamped
in Bitcoin block 960348 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059604421.
Recording identifiers
- ISRC
- DEF059604421
- Title
- String Quartet 1931: 1. Rubato assai
- Artist
- Ruth Crawford Seeger
- CopyrightID (CopyrightChains transaction hash)
0xa2f8c5e1f12e323e20b72704eec8d2e90d067a8c88ac5184e480e04c619dbf62
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T05:17:02+00:00
- Bitcoin block
- 960348
- Canonical record hash
sha256:07c984c0db6dad80509e9ecd8797df410230acb73c9322795d439f51ca523f0b- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059604421
- Bitcoin block existence check
- https://blockstream.info/api/block/960348
Full record
Track page: String Quartet 1931: 1. Rubato assai · Machine-readable JSON-LD