Orlando Guerra (gayr'-rah; September 14, 1920 – March 20, 1973), better known as Cascarita, was a popular Cuban singer who specialized in guaracha and son montuno. He became one of Cuba's most famous
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 0x96b8279600bb35aa6229ccf469de37124cc75558e2911da94adc165ada6e012b. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/107096df-d95c-493f-883c-97e9a2dea81a.json and https://artists.proofprofile.net/proofs/artist/107096df-d95c-493f-883c-97e9a2dea81a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
50 Aniversario del Triunfo de la Revolución
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 0xd314ed018bd17f5e351aa3c2fa194330c57cbead6c7b78fb17fb903bfe5444cc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFMG1397295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b40acc478949b2eb5c63023fdbcef676479cd4579a1262dad15dfa51fcd83b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFMG1397275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e63ea2bbf11a314c81fd2763ddb9fe9b0e01a66683073dcb5d6b457e6b96f52. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLH492240048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff1daffb9ba3d0625022fb718abe9809e6811bdbeec18ea6b32241602acb019. 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/QM4TW1507210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb16167acd3120d558ae6d9d1e8c1e0257e61853c68be9c4839880737693e89. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM4TW1507208.
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 0x19bec8598c5ec2f43b201eb02a58dde2e3f3e1a8fc919177da61711750d1e301. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TW1507211.
Nico Saquito Y Sus Guarancheros De Oriente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45d8fea7c8fa84feb795282447a058d569caef3d40643cc373ccf1ba50ff660. 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/FR6V82295737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16256ace03517212eef6a89beea6bfd3e0040bcbf4b4ce4079dd2c6bf2e5fa44. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR43D1604008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10910d348f93429728a07dfe748d887c0934d19e3d36894943cd2750db245672. 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/FR43D1604010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01564db414841d8087d436bab8206c5e3ea61408430822ac624fcdea8cad66fe. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR43D1604011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a4d3fa824eaf16c01f3da36214f2026c04c1c12521d9eb157076e4cbf73243. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR43D1604014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4818c28bafeae6d1caf74ef7e83e92916d90d1feab780aff34bf76b8e6c1268. 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/QMBZ91440566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70db1f5fe1e910a61b841354399cd11f4311d3d2bd885d3780385c4701dcac0a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6P41499073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa886c990c5e7f3ca63f1ec0b6a5742f39e07a1ae494ad15cb9adb510f16e2406. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US6R21355270.
50 Hits de la Vieja Radio Cubana Vol. 10
50 Hits de la Vieja Radio Cubana Vol. 11
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9449487bac0318a1b02e944fa4397b3569fb1e149f2abce191a433b3fe05bbd6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME1379809.
Best Of Discos Fidel, Vol. 2 - Tesoros Musicales Desde Cuba
Latin Lo Fi (The Sound of South America)
Best Of Latin Fever, Vol. 2 - Vintage Latin Hipshakers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ae67bdb7cb5a745627935bb0c2791b4471022fcc17c801bf15154933fd2131. 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/ES6601504021.