Coro de la Hermandad del Rocio de Sevilla
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 0xfa3fd924da99da635619981fa5d264f74099121c410a8046937935578ff336c3. 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/0b8d8155-2d36-4d24-b5fd-33f76048e1ae.json and https://artists.proofprofile.net/proofs/artist/0b8d8155-2d36-4d24-b5fd-33f76048e1ae.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 0x4227bcba2fb0cd75e3aa9318c781140587c7eb124646b9b3c1132690f77590e7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5161302369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0124b87d436f9bc8c0c9e6f38cdb68ef4a89b52f8cf85a1910c7eeaab0b83586. 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/ES5160600399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f872d0dd24cf93b7aa37fb35928573de4a23d7adb34a0f431dacb636a0f87ad. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5161302515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e86ffe2949edebcb764858a34b411c57e4ff4c321f01da3f361af34a32a5b4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:34:49Z), 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/ES5161302518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1961c54e48ff91b9e15b07ca7d72da9ba536b04b543d19f1fdbd1819802e219. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES5161302762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb45dec3b7803b721ce08e9900568a80a6e044dfbed844c8487e51e7bfc9bdcf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5161201749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fecda16bc6a6a092aec60fa0d3ea1040da5738e035a20ec6c715949af09658. 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/ES5161303284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea721ffec816f18efec3f46ddb01ea1766e44f265888e1d429144f11226215ef. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES5161303290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1201c5346ab209957ccb138aff641f31daa70e19df26cdbbf17665cf9d6ecd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5161303291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eed19b664e06d969a8f4bbabfa04d20801b3c8042b968e030dbefd0829c98e0. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/ES5161303568.