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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058ba4c9be5c5f1126afe731ad354487efa83f67231a0911b4c1d66c4bdb15e3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48f4242b-ec21-438c-bd83-69d338735459.json and https://artists.proofprofile.net/proofs/artist/48f4242b-ec21-438c-bd83-69d338735459.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523e9a6cb7755a6c3328a8a6d9e3a34672d1074493e59473b773d5d4250223d1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5701000658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d98fb1aa8d9dc843c538d94af6c5610ab8bd348e101c608d9699704a55cc513. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES5081100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760b4c2fbfa756d76d00a1e8e16f685a6876b1bc3d94c85924858eaad8a469c6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES5151400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a3e366e4f793740b647144620a3ed4fbf60be8ce5ed056fc244a756722eea7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM81982447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2444f0c4f146f1161258961b0280ee322b00029d488e3475d22731a87d2d717. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ792456073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4a5847ec9b3e9aa12a5ad3bf711c0c7ed50e1716256b692f3a223642e8cbd0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:27:25Z), 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/QZZ792456074.
Malagueña del Maestro Ojana: Al Pie de tu Celosía
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf49530df5274e05284ff0b9d86a9b23f9370591e899781fcfdfd6de0584a51a. 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/QZZ792456075.
Canción por Bulería: Canto a las Estrellas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a8dcb24a0a24d56e3dcd872faf78732eff652a9055aa6abaefecb77f571bdd. 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/QZZ792456082.
Fandanguillos del S.XXI: Entre mis Manos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d1f10f500d196287e93f9e42572c984997f7b9bc31cffb2a4a3ef20fbf0fee. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T04:59:30Z), 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/QZZ792456084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d206bc8c5d2a2100fd73061a9fb05b66958c86bb53261d3752697cda65948e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5081100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d206bc8c5d2a2100fd73061a9fb05b66958c86bb53261d3752697cda65948e. 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/ES5081100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f236582866dc409383682c5d080de9ee1ba81acb881842c640fd09ec1dc22e2. 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/ESA061908878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07288503d6333ef284dafe47671e45d31c4b695527420aec36d258b6c9078326. 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/ESA081850532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bfed0df53f267f87d680dca8d45948f59d079f734aab0c37827c07bf5c7891. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ES7771517057.
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 0xdfbe498f5642b9036022fdbf0b0c004b84a0540a9aaa1f06649ea3573763828b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES7771517054.