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 0xb52bb18b269168fb6d28604333ae32378ac6a9d3936c0aff3664d13fe1c946a0. 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/e2016aab-642f-44d7-82b8-076f645ed77d.json and https://artists.proofprofile.net/proofs/artist/e2016aab-642f-44d7-82b8-076f645ed77d.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 0x1404077e830159248b3d657f7faf227ad8f6d896b0baa88875b4f2ac9cbd9db2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES5271801606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b9018be97033b85ae2433e0b86f2e50247fc4af4b55f98ff1f7f5c6b781f41. 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/ESAAI0194376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3e9ed24e23583922ad5dac99620a180d102be67626936b7a935cfa41c26191. 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/ESAAI0194493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29096e18c64c1a6817be1477b622b92724afef671a0abf98b5ba50b3387bbb2e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESAAI0194495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9db3cf9858ed255e87e706f5762287b44b9296505e3c12a51eda0a53bb9cfe. 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/ESAAI0194497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef41a021e6d84cfa360798e2a7f875657f358ffc0f340ad301451612ec4522f. 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/ESAAI0194498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00457f65147d744eb0c88bf3c5045da2d8fbc0cf110962a3485431ba8f4f4f. 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/ESAAI0194500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9dc48aeeff9b61b4069a6d1a858272750bd0fa3173d091f5c7f0c6e9168ff3. 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/ESAAI0194505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21323abfacaf3bd6f12849669f8e88b296d89d9e7c3e96eebd9f89698f78b2d. 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/ESAAI0194507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c1b278108b5d17064e008a0678a5c03015d911526287a1e1d6c67f275aff0c. 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/ESAAI0194508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e666aa69af1a868fc7ec55a18313be5bef0e1b5ee02537cd2d9880e00ad991. 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/ESAAI0194510.
"La Semana Mayor" o "Pasión y Muerte de Jesús"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9085f858dc0efc818bb9c93236e4b3714a7f2b47f94a083509fe2caf92d484ff. 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/ESAAI0194514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e20d3f013de817b08628b8d84a03630b41e28e57a4cdeab855dbc975f8420c3. 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/ESAAI0194520.
Himno de Andalucía (Anthem of Andalusia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491dadb7a7a2d703b25c9f417d42dd7c46b767a06b08d14c94bb23dc6b67ade5. 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/DEUE11822800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b14bd01e0c394eebc331e2defc85e2f4ebe77934c67cb4656c92f33b2a5d4f. 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/ES5271100604.
Saeta al Cristo de la Buena Muerte (Universidad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d355f2d8cebd2537d71d0f51fe61f977a42722d082198ac1cafe7eed68adad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES5271100614.
El Flamenco en la Exposición Ibero Americana de 1929-1930