Miguel Angelo Oronoz Proença (March 27, 1939 – August 22, 2025) was a Brazilian pianist. Life and work Proença was born in Quaraí on March 27, 1939. Throughout a career spanning more than six decad
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 0x02bfdff5e517936d86b43da41b178a7d1297973cfd1db29ece3dd4cbd6c7a577. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d671257-c81d-4a02-967f-2aebe9050a83.json and https://artists.proofprofile.net/proofs/artist/1d671257-c81d-4a02-967f-2aebe9050a83.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Coletânea Piano Brasileiro, Vol. 4: Ernesto Nazareth e M. Camargo Guarnieri
Fructuoso Vianna, C. Guerra-Peixe e Marlos Nobre, Vol. 6
Coletânea Piano Brasileiro: Alma Gaúcha, Vol. 7
Coletânea Piano Brasileiro, Vol. 3: Oscar Lorenzo Fernandez
Coletânea Piano Brasileiro, Vol. 5: Edino Krieger
Coletânea Piano Brasileiro, Vol. 1: H. Villa-lobos
Coletânea Piano Brasileiro, Vol. 2: Alberto Nepomuceno
Noturno, Peças Líricas, de Grieg (Ao Vivo)
Grande Fantasia Triunfal sobre o Hino Nacional Brasileiro
Prelúdio 21, 22, 23 e 24 Opus 28 (Ao Vivo)
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 0xc42012a9508103edcec566d241582bd5cc3231f7603a65a3d457b2af88e9d801. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BRTRB2201232.
Música na Sala: Miguel Proença & Leonard Rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753c95c5348feda6676dcbcd359be3877273efdc835457c90d72c31db64972ae. 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/BRPUI0100012.