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 0x7736f1df0131d270652a35acc5ba9b4b1988d81bde5951350b3a52d8116bd4d9. 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/66518c2f-46ec-4fe0-b4dc-a2c4f356beaf.json and https://artists.proofprofile.net/proofs/artist/66518c2f-46ec-4fe0-b4dc-a2c4f356beaf.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 0xf6d11dd4c117d9a72574b82ed09c6b2574e9bf4c834fa6d5c7470777daf069f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZQMB2100927.
Mi Ranchito / La Feria De Las Flores / Los Pájaros / La Vaquilla / Mi Gusto Es / Árboles De La Barranca - En Vivo
Chuy Lizarraga y Su Banda Tierra Sinaloense
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0936120b97d5fc8a7454c0ccc7450be4d8d9b6057bb5fe9923e97e25760dc62f. 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/QZQMB2100970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0212cd321c209c92fb33549d7e21f8e558ea6bd9b63b1b284cb2a3e4b6b2e78b. 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/USUM71312547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacbccf13606b53e865136f88d246f42834e0f9930fbc17d4d9f20b3c24d76c5. 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/MXB952400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067fce030fb6356d9520fddcf09f81524b445059303ebfb2b11a58f4bd6a0f56. 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/MXB952400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013a03c36be2c0c5d7cb47dda09c0650e1ba776d92ce5f28ee36a7a2965370e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXB952400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a28f31854dc36f6ee8446500ba94b241aeaade2faf0ec717e3169c91d10541. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MXB952400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec41caa112bb9d65e726a5f1390b7058f36c5d4f3045bf0aab703026f58514e1. 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/MXB952400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615b08c677b562fc0492cd0f131af37517d13d2f4dec6cf9618823fa1c061722. 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/MXB952400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0956cefe0b44fb36e78554b7e0c079b4afddf56a3de70d84b89f8e6bbdbc28. 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/MXB952400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c306f58765787a3daa017808d557079c666474cd4d771812f73b7d6bfb877c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXB952300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb672b0a4deb06bfa99b95fa55e6de5952ecf3c2dd951a2af32d96fa8af49fca3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXB952300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec21443523b4c63052e0e6cfe83ad947fdbb8c852242c88efb1e9ab3fa883634. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXB952500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7251bbc1baaee2bf87f77781ccaad5b5b302d8964d1998416aa9cf927a36786e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXB952200132.