Dorival Caymmi (; April 30, 1914 – August 16, 2008) was a Brazilian singer, songwriter, actor, and painter active for more than 70 years, beginning in 1933. He contributed to the birth of Brazil's bos
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 0x72a9a91c5a50d0f0be50b0cf6a7b1b43cc698bc9c192bb5285e8a1bf7f57426f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80689b14-330b-49b7-8075-22b80d752682.json and https://artists.proofprofile.net/proofs/artist/80689b14-330b-49b7-8075-22b80d752682.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xa568f23916e63df7019e9fd12a2640fcac701a3c8f4d204f97a09d7d5f178c8d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:19Z), 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/BREMI5800124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfedfa8a681b7fddd2129abe9792cea9bb66b5f96b5cb85c82892492e3f699e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BREMI5800125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4d6870deca775cca2621c0d2cd275ab60947d45928a54487380a22f56a4905. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BREMI5800127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27805c5a60340bc3683df62d02e73299528194836e9c696a24ba1513116a5a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BREMI5800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ae02fabb25391a871920472c33883644c2b7b8d2adcf570a138372aef9a895. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL66V2200613.
Sambas Y Canções - Dorival Caymmi 1954-55
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a28a3eaa1877714791d9abf1ebc4eb9564a00aad330aceab96aea3600ea07f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDHM1826967.
Dê Lembranças A Todos (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a7141adfc2fe75984cc98c95916872fb313352a69deeebce185e909d83666b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRMCA6700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a97c6171fd02c1e9653d092e6321935d181c8e660d356629497f70c930e382d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRMCA7500002.
Rainha do Mar (Original Singles 1939 - 1957)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c1ece60527823a5a95ff2600363b598b69ddc4247dba854ceea341ee3d8895. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BREMI6000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed53ec8ec276fccf58e0464a18ca62605f3361e5751b053e70594610510235f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BREMI6000016.
The Music of Brazil: Dorival Caymmi, Volume 2 - Recordings 1954 - 1957
The Music of Brazil / Dorival Caymmi / Recordings 1954 - 1957
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb318782ab40886ed2f939361060ad478b0fa4ebb68ffbc58638caed32c648b1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BREMI7200486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7db9c553c464d7acb68b26e51c13d6461f79fe022c0f7050c5879d4a0d33e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BREMI7200487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9c7c013d440f5d144b7486f4df9bccfbd1c48d9119751de93b335c182f2f22. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BREMI7200488.
Dona Chica (Francisca Santos Das Flores)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76ebad880f7fdfd026296ad797327a15beb2c793c7e9d94f1c61b875267c147. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:01:54Z), 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/BREMI7200490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0942e29e029b138e60241f28b10317ea2747d81bde69d1b2a52427277cc9cd9d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BREMI7200492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf050ab225a34454640e5937aa2a4c24684a0a69299f05ce7ec007abedf1c00a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BREMI7200493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3848e5a8f5ed36de08f0008e34d764cea10e3f423cf4d012657462a8d6139aa4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BREMI7200494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a2dc41cbdacc0fdc5aa2a395bbb55069efbb558b1f025256406cb49a12cf71. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BREMI7200495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe695edfc88ea2a730405c4e0c08745f05392a8dac2579b4b7eeac2806f9a208. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BREMI7200497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffa38ef5dd6cf32174e03ef918889bdc4935faea55d33c4289d821b0cbbb2bc. 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/BREMI5700079.
Marina - Ao Vivo No Rio De Janeiro / 1987
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed9e876d441badf6ea08f3d6bb18037c9b4acfa019856e328d136267e7fe466. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BREMI8700261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763c7edea594a6431cbaf86f7e9b5954e5cf7f0057d665fe938ce7dd787fbebb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUM71200192.