Sin Fronteras (Spanish, translating as 'without borders') may refer to: Sin Fronteras (Dulce María album), 2014 Sin Fronteras (Makano album), 2010
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 0x051670fa411d4be71a653065465a13f6f5573c4b6ced5f27e3535a6ce612d12d. 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/0cdd6b59-d9c8-4350-a923-77a0ef469b7f.json and https://artists.proofprofile.net/proofs/artist/0cdd6b59-d9c8-4350-a923-77a0ef469b7f.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 0x6bf94e2eadca7e2c64dcbf3156119521860cb5f41d999db70ba7733e0cd6a45b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:33Z), 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/QZTLA2343142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479fce801664c95bcfb61ab3770c39e22003ae754db705ae18ed208b1b178caf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTLA2336533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08adc02112092ac16966deae55a504839d311bf38fa4c4f0ada869152096507a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTLA2395706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a220fdd25cf51af3d508dcd9e25d18c64f1c4624a9b3dad04fa8776d05bf35. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTLA2349640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bd18625b40a2556d6b8a834269e6e381c322a12bb0232432e2fd648609a7ac. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTLA2357544.
Lo Mejor de Sin Fronteras (100% Merengue)
La Chiflera / El Diente De Oro / El Farolito / La Cosquillita (Medley Típico)