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 0x9605f36c692087cd70e724e054eda47abb34bec603ee8e58796c2b6dbf5a5c2b. 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/37842050-fdcd-487f-a422-3f52f2de8809.json and https://artists.proofprofile.net/proofs/artist/37842050-fdcd-487f-a422-3f52f2de8809.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Popurri cumbias: coral / rosa Valencia / cómo será la mujer
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 0x4504d59a23e0242d1b78ffeee65170a1e4d7e1574b646cfd6a1407db13e491d1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDQH2271144 — a six-check JSON result.
Popurri huapangos: la boda del cuitlacoche / cuando los frijoles bailan / la loba del mal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a165eabbeb12407da04b06b7b38743ac2f12ebb528575039291cc2799140447. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDQH2271145 — a six-check JSON result.
Popurri cumbieros: Teresita / la flaca / Elenita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf248b4595552eb417926161aedde4dcffbec0f649f9fc0d73a68f3983c3a22. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDQH2271146 — a six-check JSON result.
Popurri huasteco: XOCHIPITZAHUALTL / el zopilote / el indio Juan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f728cd13c1afc5d6b7328a82facd950f67da7e7c18c28c5236df720ccd123d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDQH2271147 — a six-check JSON result.
Popurri sabor a Colombia: la paloma guarumera /cabeza de hacha / me voy Pal salto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55528856c4bc04b8330dd7e2fde20dba6d2d4d458bb2ccd5db920a5628c5220a. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDQH2271148 — a six-check JSON result.
Popurri mar azul: mi güerita / el chupar rosas / pinotepa nacional / la vida del pescador
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d754a3979eeddd37b02a62f148f305ca176d0ab21767ac69a63f990ed6fad0c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDQH2271149 — a six-check JSON result.
Popurri norteño: la puerta negra / ni parientes somos / tumba falsa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbc44732acb10cfee47e8b62f97a2d564cda9fc07d73ecd7712f57611030287. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDQH2271151 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810acf448d7915727ccd4784b0a5df29f1a293cfa75982b6303e09354b2d5be7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDQH2271153 — a six-check JSON result.
Popurrí Huapangos: El Coco Rayado, Que Bonita Yaquesita, la Picaré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af22a9f35dc9c6ca52cbdf4d8186e0c4ff3aa84976da4d7b21de5590281e389. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2482292 — a six-check JSON result.
Popurrí Acapulco Tropical: Soñé Contigo, la Cumbia de Mi Rancho, Acapulco Tropical
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f680e30b5d88402803087f1c0d01fec006f80ae601bcf64aeee12de30a4473. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2482293 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005975bd73b988b37673ef7a4714daf373419e768c654dda45b69ff60018f629. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2482297 — a six-check JSON result.
Sones Guerrerenses: Son del Ocoxuchitl, Son del Tlacololero, Zumpango del Río
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f6bbb671e5cfe6c065b8c9854ad4d4051577566c1d51486b36ad9ec48cf924. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2482302 — a six-check JSON result.
Sones Guerrerenses: Son del Ocoxuchitl / Son de los Tlacololeros
El Chivo Flaco / Son de los Viejitos / Los Diablos / Los Santiagos
Popurrí Sabor a Costa: Morena Morenita / Mi Barquita de Madera
La Boda del Cuitlacoche / Cuando los Frijoles Bailan / La Loba del Mal
La Boda del Cuitlacoche / Cuando los Frijoles Bailan / La Loba
El Coco Rayado / Que Bonita Yaquesita / La Picare
Xochipitzahuatl / El Zopilote / El Indio Juan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6dd5613ab9deddca7513b500e8187e86aea169080d2009984d2ff15fce540f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2443934 — a six-check JSON result.
Son del Ocoxuchitl / Los Tlacololeros / Los Moros / La Candelaria
Mi Güerita / El Chuparrosas / Pinotepa Nacional / La Vida del Pescador
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd98e90abdf129d6ca1e0cf142e169a1c99f3ed93fbfbd08591e3131de053ae1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2561021 — a six-check JSON result.