thumb|right|250px|Susana Harp singing in Mexico. Susana Harp Iturribarria (born April 8, 1968) is a Mexican singer and politician. She currently serves as a senator representing the state of Oaxaca.
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 0xb251c611fbf61882d3e49f227b9405bde282d95cd67211661bcf1206a7c3c900. 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/719d9594-e883-4987-a649-fcb6f7f7417b.json and https://artists.proofprofile.net/proofs/artist/719d9594-e883-4987-a649-fcb6f7f7417b.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 0x990087c7d6409ebf99b8f8dd09bae45bd16d779e5a09c20e2b18b00cf4700554. 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/MXD781801918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd07e33735d1a0741255b44b6bd6ea414aec33e1ba2f013c54b69b08967ee59e. 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/MXD781801924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3777adbe05c91182fa5afe1850401f66260b41885cc396ca38eb116d5b945a0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:28:41Z), 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/MXD781801184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb9d4abe6f055fb7bb766c75333ffd7d9cd7664c247ce2cb2a9e85940dc98a9. 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/MXD781801154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8742a3da34450475070a0b3e88b30e4ed57db76f2eed98f19f738bdfd58f2731. 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/MXD781801160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd1ef82853a8dd470adde1c727126df6ef9ac95baaf570fff5d14ef8afb1f39. 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/MXD781801162.
Misterios Gozosos: Cantos de Ida y Vuelta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3575c0922f663a1ae110f4d5e59b2b7f6e1cd7885daf81769648fb866f98567a. 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/ES71G1623991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7870c85fb20b62a82339de87838eca659b1d52e52bf82293d24fe31394249f42. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:12Z), 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/ES71G1623992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69338af04461407c632e6f81f02c23a645670c5e12d979bbe02f21c5118b8ad8. 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/ES71G1623994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79ba19e6d94492e2571238c9a78f3637647db3cffc49d5793646c2dfcc7027c. 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/MXD781801517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6d31bdba74e5acacb88c453e12c2dc6395e6c245f1a39c17b72691f98696cd. 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/MXD781801520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f30e4cef4538344e8ac7a5b748ceb2f2e60a965f63bc2468bd8c6772973351. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/MXD781801521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289fd702690f5135501e02065ed184c1bd39899140156ceccb957f079aea28b1. 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/MXD781801522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dcfdea925c2dc778d2eaaab2b848de53ff2fb303ac129132c18e9421236f30. 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/MXD781801525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0c47bdb67d59b36d14cee491d83907ed6fedb79695a44cad0fd8b8164e985. 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/MXD781801526.