Marion Eugénie Bauer (15 August 1882 – 9 August 1955) was an American composer, teacher, writer, and music critic. She played an active role in shaping American musical identity in the early half of t
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80307776f264f48618dcb2da1a477780b0f1d3eb7a70be1b531cca7ffecf4377. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e140fda-9f27-473d-baf3-bc98625099b7.json and https://artists.proofprofile.net/proofs/artist/1e140fda-9f27-473d-baf3-bc98625099b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Marion Bauer: Sonata for Viola and Piano, Op. 22
Marion Bauer: Concerto for Piano "American Youth" (Live Recording)