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 0x59cdd6f659425c6ec28e17e4c6a3a561359dc94decfb18e41dc2b17127252dab. 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/19899a7b-fd9c-4d3b-8a92-71096eeaa909.json and https://artists.proofprofile.net/proofs/artist/19899a7b-fd9c-4d3b-8a92-71096eeaa909.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 0xb796bc19ae4d78c369a2f7d1f8514ff627144f792813e913be3f9b37fc32e0b1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESUM72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeafb2c7914881188cdb3b5848c2d2d5cdf501ca37d950b9ea8d4ec1c0f3eca. 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/ESUM72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa8c2e3d48312f6160f2faddc1fa6ed8e7c3d7f57026e69af9d24d0efed6739. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ESUM72200003.
El Sitio De Segovia Y La Quema De Medina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b453f855b5f43d6df225bd41a4b18d1ee19fef6ecde3156f7bfd5ea727a2eb0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESUM72200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8689872a2da0e12757f70572299ca99a0563bbfd91eb97d15df9e6bb7accc512. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESUM72200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b94441c966a7fbc438456760d377cba0b96a9e1cf188cc129faa42a50356ae. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ESUM72200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112818b135537e94eda5c2a05c29db804f463cdacce9c4e0aa1788199a5d4718. 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/ES5700300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ea6f12c3f659b5f6b76fde942c7b46bba9e013bdf32baac358edcebf68377f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES5709901645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde10395000711eefafb8cd60686e5af2626aa4258e51cd3a7b475c65cce3f48. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:26Z), 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/ES5700300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dcb27352621b6fb588b5e389e0770b28d3e08d8f846c292faed3325ff9de2b. 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/ES5709901649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa7d3848136606b0c9012d86d12c2e65473df5320ee897cffc793c73ca66998. 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/ES5700300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d58c9b13de6a82ba9b922c8dbe9ac86cc9e759f969c51ab6febca92fbe52b24. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:52:10Z), 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/ES5700300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fa1363e38feaaa5fbbd16b9d6b753cf5431173ab66ce18d2735a71a3ab6c2b. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/ES5709901662.
Castilla: Canto De Esperanza (De "Los Comuneros")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c773f25788a8cbe73b4edef2befa40f0970822db93c7f0e1c51375d26461956. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/ES5700300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea14e16f93fe654a2a9b36b0d7cb8a319c2add0bd6a1628cf48eee3e448f5c6. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ES5700802367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e7220ffd25c2e65809cda7dcf09664feca95963220f30dc7c4c78bc4c9c6df. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES5009600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32d7cb6deaf1a493a4485c146d5b7626a3dc32bf07b4f758e1be88652897b1c. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:53:35Z), 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/ES5009600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e91ee0e583fa68d6e552f02124383ede41a889a36c0dbaadefb92316f0b10e4. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/ES5009600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c8c59ce9ac366253f2044f469b8b4f11f9494fccd018ac742d68eff0b52130. 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/ES5009600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167e8c60ed55ccca5c8a6a6bab90f07618e426e15b696df8decbd4b503cc2a3b. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ES5009600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58403c2df3e2955af92fee6cc80d84f9bf37f61c41923fd8f9337844c9f2379f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ES5009600026.
Nuevo Mester De Juglaría / Los Comuneros
Los Comuneros (Nueva Versión En Directo, 25 Años Después)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db347f8c29d10661e53c7954a6ef1559c84cea16b1513678b9200748ef16c45. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5709901647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564307f015fed9bb7537e98e2c329719ffd3c16c1847712f0f3eba1277a10e03. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5709901643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d25001a51398300b7a4f6293445aa0a7d63c3e0546eb0fa5947d64aea8b194e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:38:30Z), 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/ES5709901657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb9b16a0f8cc2dcab074da602c4d737afb231d68e5d5bb672d258ca53b9fa40. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES5709904622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281d5de3dc1064efce821a77007126c1360c85edb529457189c0c114e73045f7. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/ES5709904606.