thumb|right|Ernst Gottlieb Baron Ernst Gottlieb Baron or Ernst Theofil Baron (17 February 1696 – 12 April 1760), was a German lutenist, composer and writer on music. Baron was born in Breslau into 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e1578a88a71caebdc854271e2d5a130fc48539eb274ba714e597962e23a2d5. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e91442f3-bad3-4522-85c4-e894e59a6304.json and https://artists.proofprofile.net/proofs/artist/e91442f3-bad3-4522-85c4-e894e59a6304.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Baron: Oboe Sonata in D Minor / Duet for Lute and Flute in G Major / Concerto for Recorder and Lute in D Minor