Manuela Josefa Cabrera Taveras (born September 18, 1943), known as Fefita La Grande, or La Mayimba, is a Dominican accordionist and the most recognized female performer of merengue tipico, a more rura
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f04bd76d85be1b930a9181c591ab674cdc89e0e24207c2bc1b25b308c04b2c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08db3c73-539a-460f-b3b3-bf8a03cf7171.json and https://artists.proofprofile.net/proofs/artist/08db3c73-539a-460f-b3b3-bf8a03cf7171.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36b33102ece3260d3529dd1b7f105cc3ce25e7f7aad2414373533fd4180b499. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USQL81000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c170c1c15163c1d17e0b6a908e6fd2d91a576ad8e28e3e13d21c7d207140a4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USQL81000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dea74cf3e95264044fc8c313d9bae4ea244b4cfabdb9f045592dc958912426. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USQL80800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3676d996da0e47fef87e7d5e5bfacc1faa7adb127fdaea1628c1249ff6c7c14. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USQL80800565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9705d8dbf2b4fcfa48f7cc598c4bc440c69baba459e83eaecc9f3e4d36e614ca. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/US3Z40800536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bffe84131a3a7f22621ee459bbaa53a165b1beae66a16f847314568c09d4a3a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USQL80800331.
Fefita la Grande en Vivo Desde Monte Bar las Colinas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3778e22a5b0661cdc8c9882c3f84a6b6d3bada905372bd7d1b47c631de19922c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BK4DA2205957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3778e22a5b0661cdc8c9882c3f84a6b6d3bada905372bd7d1b47c631de19922c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BK4DA2205957.
Fiestas Pennsylvania Estádo Unido (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aad9d9a17ab17fabd1959a94ff258b31b44068a4ca5461988ed648cbc594b46. 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/USDBB0680065.
El Papá de la Bachata, Su Legado - Añoñado I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc12933ff12969b1f5c04a528f05ecc4afbc85db0e15d70755c84c08815cc951. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEQ2043071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897eecddcb5baf755d1545d5b87e372f6c38668291b639d467f846d45ccbe54a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USLZJ1819230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1810196603e13579b750a1589b5f976742997cd3c4d570a98db864cdadaae067. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:43:20Z), 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/USBMS1400171.
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 0xb3ad80624b2ab1996f3ab92c9e23af0fb5bdf9335d8448815afa1fe2e7bc145b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITC471100452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd41412ddab918b4b85efe7d9c337c4ea91b50b1694bfef2e5cefdf22a7255f8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QM6N21512167.