1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x3927c9ba3ef3101ba918b142ebfd0cb3c2556befa2b2d58706e9b96ed8416fc0. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/775cf87c-3d88-4b7d-840c-b32cda7335e6.json and https://artists.proofprofile.net/proofs/artist/775cf87c-3d88-4b7d-840c-b32cda7335e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonata para flauta e piano, FP 164: I. Allegro malinconico
Sonata para flauta e piano, FP 164: II. Cantilena
Sonata para flauta e piano, FP 164: III. Presto giocoso
Bachianas Brasileiras, W392: I. Ária. Chôro
Bachianas Brasileiras, W392: II. Fantasia. Allegro
Sonatina pour flûte et piano: I. Allegretto
Sonatina pour flûte et piano: II. Andante e final
Antonio Carlos and Jocafi Sing the Music of Jorge Amado
20 Super Sucessos: Sucessos do Rádio (Seleção de Geraldo Freire)