Oscar Lorenzo Fernández (4 November 1897 – 27 August 1948) was a Brazilian composer of Spanish descent. He was born and died in Rio de Janeiro. Life Fernández studied at the Instituto Nacional de Mú
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 0x3364754654a434c56b728a11f4794a89aa13a9a4a4ec687a8e4cfaca1397d53e. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f0abc11-3a28-4f01-9579-b5d5af2b355c.json and https://artists.proofprofile.net/proofs/artist/3f0abc11-3a28-4f01-9579-b5d5af2b355c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ó.L. Fernândez: Symphonies Nos. 1 & 2 & Reisado do pastoreio
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x241d15bd96d97e0c2589450799d8c7b8c0d84658b746fbca8140a02b33ed6691. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192347803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701f8a0705cdd7c506ae6a451ac369d28151d23ddb0ccb858d4b7e66296ef729. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331209140.
Orquestra Sinfônica do Estado de São Paulo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78dcc0aa61aa0de733392ee8c832c3195927b96b13c89458d1f366a4c7f64eb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEO1130060.
Suite Brasileira No. 1: III. Saudosa Seresta
Alma Brasileira: Panorama du piano brésilien du XXe siècle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c632d5e83dfeea18b821b2a3ba43d3ce3afff6f63168e498ead578ac2ec8593. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRP900500050.