Los Primos de Durango ( Los Primos Mx ) are a regional Mexican band. They formed in Vicente Guerrero, Durango in 2003. Discography 2004: Grandres Exitos 2004: Mas Candela Duranguense 2005: Nostalgia
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 0xaa23dfd30248384622c14e2b76303e92cf14d58a4ff4bc9629fcfe9aae832a97. 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/2fb4a996-ecc2-4029-8ad5-d6cc45c0156c.json and https://artists.proofprofile.net/proofs/artist/2fb4a996-ecc2-4029-8ad5-d6cc45c0156c.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 0x417eee1ccec25f2df586adf5cd64445b3af0956145af23e3f5dd6924230e1401. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QM6DC1547653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db0c5710ffe7c0e7c92bc883a6f1122111c3de44db858a52204c75d71d0ef9d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QM6DC1547657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd152c2a060fa9cae6a5153918f5ffc1ee2ce1526aa672fd97975d4a85bbfcf6b. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QM6DC1547666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d0185c0c35f67225491de7ca4cf838b92ff1d40d2199cde17a4b726d2509e3. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/QM6DC1547667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc802b2e3a31054ad44e0d43b2b0d8e35eafa55e1eb345f1c7af6a5157b8a06. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6DC1547673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576aa3a00f8f20ac1a68152830403b7787c3c9bb81c2da43ab771a90c1c9b886. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM6DC1694257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e33645fbd90a8bd83bd63f7219c29286517f36e8228f0614fb85032669d78d. 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/QM6DC1885366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fac60e199d2ac673569ccef3ebed4cd34c8e8978d740cf79edb00a35fd5c0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM6DC1885367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16be6539c0b46092f2668ffa9f77b40b6012f1d78ce040f05d817f5198bc636. 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/QM6DC1885369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d856a4956dcae22341bd6ef1e4c7efc605b3c97bce62e4584d9ebafa7ba1a13. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QM6DC1885370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672736c7f1147e5f503c7b963c13a0f0a2f8783a860ad9cd3108f8736f62a753. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM6DC1885372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87f3bf911aae5378387ee9b7b690dffdbeb5736f4d02fd5f568ee22ed05d4d1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM6DC1885373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2cf4d06267a5a6dbcf04e4bac1a1a9e527c2cdc36b36a07ebd1d1a65f96c71. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QM6DC1885374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c443e4339ced46fbace6327d868394a0836e076720e18734a14af1327b3ef9a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6DC1885377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e93838a59709892f19c36ed5e7dbf4ba4d4cbd022d9189ac1e3abebfdfdea. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM6DC1885378.