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 0xcc590032f0e4d8948c140913a8b731249ca4dec189a6cffa93ffcdbcc2f0aece. 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/09d40520-716f-4540-9e41-646f0d9b0c0a.json and https://artists.proofprofile.net/proofs/artist/09d40520-716f-4540-9e41-646f0d9b0c0a.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 0xf1f933915a571b1eed2a868b54ac239678a4e851222e29dfbcab968d74e42d6a. 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/ES5018760007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceece8e2c90eb9527fbf7c3dfa2bd8d50d57432187d79a096e5a98e6880d3d0. 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/ES5080800647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f413494048626fd3cab7fce15dfdb115503a46898fb960beaa8c2514aa51c0. 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/ES5158834001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0b1f4085388d6a2ec36946063a0e27b877b76684d11684438e6e8157020076. 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/ES5080600400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfa3c370a8fe35b2fc9f0a835432583111413cdeb60571a26ae1c3e211961f4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRWMB9600789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a08c2ef323e92b7e59f9f5ad3e6b8eb34095aa48eef4a9f1e2050a17d37f44d. 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/ES5151300892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3868c7aeffd5d78ad9700214de0a725bcd667d9902683d813363d04334f0b391. 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/ES5099800378.
Purita Dinamita + No Molestes Pa' Cuando Esta Trabajando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d68c8ab339b001444e6d6eb781b5ed66592b81074e97e385c8bcffeeb3d45ee. 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/ES5018887004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754da1aa493848bf252ec1525413457ffe16edbb388cefe71b11868708a984a9. 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/ES5019387000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b1d35636c81c3fdd64ee8b1251a50a515a79fca6fe758f6f67883609070718. 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/ES5019287010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9435a6c438d87ac3a3a96917bb6bf82ed0d75d27b40801236a84306e51aa2422. 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/MXF160100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06010f14a0c832573b17009b7a7cb6006fc7326a590090ac78a8c20c75e9127. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USAT21205862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc032f30d4602b9fe33cb774f995d29824b9097bbf4d6e7d0190e2dd8525d4a8b. 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/ES5150800936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a6042b354dbe935b8a55387cf35f03eeea7e4bf17815a5a52058094c7ac821. 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/MXF160400572.