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 0x99cbc068f27ff725a811ecd11a3039726fd9007ce9f73b3d235d20ea0645d976. 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/898648df-abba-4fa3-b7a9-8f50cbd4a805.json and https://artists.proofprofile.net/proofs/artist/898648df-abba-4fa3-b7a9-8f50cbd4a805.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mix Aniversario: Ni Tuya Ni Mía / Quien No Le Ha Llorado a una Mujer / Por Alguien / Cuando Vivas Conmigo / Rendida a Mis Pies
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 0x6170b81bb2d58f3fded93dcf9a80c02c3d2f463d6292b7bca942bfbaa1c0a853. 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/QM7282066339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5911a4aaeafcd64bf9945d1d5e9f044c703be43eb85f118eddc6f671b97f12c1. 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/QM6N21725600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75fd381c4d56fde506e41a4985244bf6a5fc61ae58ca4465f3a91d89ae861d8. 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/QM6N21725602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68d8dfd86716ddb4dc24fb8b368ba098b15f6f43f66912658824af817c5bea5. 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/QM6N21725603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0e13fcd78d730abb467fee0483dc986443bda2bfdbb08c60e2b3aa08b2df98. 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/QM6N21725606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabeafc68cdb2b8ff160812b24b952b7e594344f680685c0edbc5bd0016017062. 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/QM6N21725611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dafe914758c96de56a36015860c2d2c11b500b885fd857e7d477660bcc0dd5. 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/QM6MZ2434202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16853e48efecdca1e370f267a1081f3f88149aaf54d38e6ad04be0a26db285f. 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/QM6MZ2433638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b8c3139d1940a0ec3bded81d08155ecd57adeba67fbaaaddff096132ac3231. 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/QM6MZ2430897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74737ac197d24a49df8f2228b1d49c2fd1e105c57c2e7d1895f2a6a50fdcb3cb. 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/QM4TX2491198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd21b805f34e07f60f434775dc3426c2dde26d7ab950ce3206f5f7b0926aadfa. 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/QM4TW2249588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2df758c0886f2de05c6269b4f36e6680f994a368ccda285ce1998939f72f08. 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/QMFME2192016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ab6f08b2a3f474518329256b65bf79955437f9867b4b32446ca530784327af. 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/QM4TW2137723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b35ec1abc1bd44853befc12bcdb52261d564fb41ed19cf64c4ff87159af475. 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/QM4TX2103475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d80ec385101e88532fba835d4dbd879da3a249dfa7b5aad4e9bcf4f7b25a361. 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/QMFMF2024479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c0397046d73ad42b7b6414f7d232a3f14ad8336ddc7a2e350bdd0f388d7bcc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:49:29Z), 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/QMFME2085118.