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 0xa1bb0cf969c51132a28aa2a8f3c4d1273ea302946373fe24e79518d97be24806. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4625bf30-4267-4eb7-a861-8d26c588cdc3.json and https://artists.proofprofile.net/proofs/artist/4625bf30-4267-4eb7-a861-8d26c588cdc3.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 0xb84e46c684d04d22f82142bfb57b96987f29e48992430390e88df91d0684ecb8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBSMU9235555.
Mix - Yacaré: El Yacaré del Pantano / La Manzana Sabrosona / El Marinero (Barquito de Madera) / Cáigale el Guante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed486f1172039182551c03a9ad818abe337271b81a41c21900e1718d8db78d6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4TX1716200.
Mix Picaito: Chancuncha / Contigo Me He de Casar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e27363d3f0cabb2bb27fdfd4030759b248796494b356b6687218d9aa4bc997. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4TX1716202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c9b8c783ef798b75a70b23b42ea7ece763b73d58ef17eb9e5be19aba157285. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX1716203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1a81a16b3e6f800f9bd86fa5904453bd00d5c190f5840c83216eda0baea36c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:01Z), 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/QM4TX1716204.
Mix - Homenaje: El Buque Con Más Potencia / Noches Eternas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037585ab895f3abf5f3f42b180d8a6999a24a0f68491bcba3a216b62242a329f. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/QM4TX1716205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bc371944ee9d0351d61282133a9ee29b49e0349b5a98c69e9f6814553d5756. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1818516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee61119e54d4ce167a1526b283fa32c6d8d4a22097de89a3e1a02d3f4a3fae3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1818517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44c37cdb9cd0facf0bb34efd98260d67cb9c7b832f8d6fc7a416edc328a1dc5. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ES71G1818523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf7808ea2d3a31d474a6c21a4770a6ae547157f2a74607e3f1a7664977f65df. 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/ES71G1927976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0046f39284c92335df86bd7911fa5888b297ddb62941eb382c931774219c6094. 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/ES71G1927977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1090f7a1edb20c2c1d8201fba7550e35ad2c0faffe08363c11bcf61088070eca. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES71G1927978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429ece4daa14bcd3b167308ac118e7533be46bb095c93de7630f985cbdfb2afc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:56Z), 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/ES71G1927981.
Tierra mala / Cuando te vayas / El parranero / Un hombre soltero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f86c230393eb1cbda2767dcb63a2fa985f8e03e9fb57699964749810553cca1. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:20:41Z), 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/QZW9L2290477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d63f300c9fa64493a12f9862874d154a39a25d11127cd39f384e55098fb5bf. 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/ES71G2415250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481343a8304d8a34cb1d96d5c5805cee9252890a0042365f534e9c5fc2997dc3. 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/ES71G2323833.
Campesina: Ay soledad / Guajirito - Larga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce13cf331377242ce40121c5d5f3312a477b128a006ea79a769afcf91b44a5d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES71G2415251.
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