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 0xa1686d978d5feb6b1f3378272e75f66d48876bddf84ecc46e9acecaf48ef5b08. 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/0fa079ac-a7f5-42c3-83c1-b17e0d44033c.json and https://artists.proofprofile.net/proofs/artist/0fa079ac-a7f5-42c3-83c1-b17e0d44033c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Sapo Y El Cora (feat. Rogelio Martinez)
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 0x48384b97498ce33c6a9072a018ef3f51b8ee8df36ab4fa3ca0f0ac583540a463. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/US3DF1958838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5127f822ab57f95cf1ddd0a9cd80c2585b446b9cddf9545d05df2a6c2d1d20c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF1958871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a798b711bfe1835c4204d0e81c0bb31137ed7697034f6b86d54e5ade770783. 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/US3DF1958872.
De Regreso En El Ruedo (En Vivo Desde Nayarit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe434209ffdd66eb29738e3312789f5296ac610ed33b91c1337f1c0d4a93a9e1b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USANG2096931.
Joaquín Lira En Vivo Desde Mazatlán Sinaloa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672c64f50e3d336cb3ddb59ba19356ef30ca34245caad27e95646b60888efb46. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DGA052354159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c579c96e1325e67e80bb7d01acd3dc298ad566e9aff46810d607e576324949. 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/DGA062378112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba7f7cbc3c0c4127c0847de2178990397573010f0d2f225def1cb922408a4a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA052363492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53c73f3a824e27c3eee37d1c204a572b46ab75860b4e205fbae8713182b248a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA052354160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa267153116b32f837613ab6daf67af57111add06c9df0a9263b37beb6d06d006. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DGA052354161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e3cf26e95910a058ef190acc9fe68fb311c2f7de7b6fa9d0916d962e87c170. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA052354422.
Lucio Vazquez Y Los 3 Gallos (En Vivo, Popurri En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508e9c23cf8d678fa47a7935ba8e7f40bb19588d929e16086d572d10c8e4f6bf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA052354425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d27bff7cc13e7de1eb25949ce483c0e8e9e2a47aef52516d7a725558882b6f3. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/DGA052354426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d851782316dc5e9724743eb339e62bd8eaee1d1ba6411dbedd37552cff9ea3c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USA2P2128440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb81fba4732ee82ae192f6f23bbc384bdba0fcb8681cdb85c82a8601872dfa1a. 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/USA2P2128441.