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 0x95ba9220617c70cbaf53f64586cec3ff9d51348d93b6d425d26fed4cd4acff60. 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/9dad95ff-996e-4b35-a56d-67de092a0b8e.json and https://artists.proofprofile.net/proofs/artist/9dad95ff-996e-4b35-a56d-67de092a0b8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Essential Classics, Vol. 378: Vicentico Valdés
Antología: La Colección Definitiva (Remastered)
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 0x8511455afb2f4536abee764c98488517ec1cc2791d57eb63421225a623073e26. 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/ES5621904126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec94b6e609425217d040df4c00fc2a6485bf059a9e35b6568d9eccb73ac9562. 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/ES5621904128.
Vicentico Valdes Con La Sonora Matancera
Vicentico Valdés Sings: Cuba's Dynamic Rhythm Vocalist
Vicentico Valdés Con La Sonora Matancera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185b9e72c8d208562eaf22877e2655305065038cf2190877edb0a8b3da7bbd46. 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/US78T0503961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44bceba54756b0d66dd6e0054fb060632e5a065e2880454912f61e82379c27d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:50:32Z), 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/US78T0503966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3517f1275238f48648a1767fdc501a0bbe7a04c3583ebcf88d60bc60d8cbf4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDBB0951616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f1b9bbf32e2f1ee435f776ca2f2c22610593b1d01963378e8297bec1e185fd. 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/US78T0501949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bc1e28739442a4c30bb16395106ea9b60c4b688547c48c771049b34c96a8df. 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/USDBB0991651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff88fdcac62c27bf9357bec8dd8b4914d5a7946851d45f7b4d5639b617521ca. 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/USDBB0991652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3777fee20b3782154a2930d302df179e22ef66acd8b8335fa2fe45366491c5f7. 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/USDBB0991646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9343fa07dfd53b092e9477d6840917c28d84f6de52e9ed4bdd67523c4322d709. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US78T0504530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93dfe91a2dd224db29eaa479e9a63b6c79a156de0e3c61730b4674989ec5b77. 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/USDBB0991653.
Clásicos de Vicentico Valdes Con la Orquesta de Bobby Valentin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08799dbb50c5ca06ae26ca8caa4eae27b4e444a8343cf431dfc89dc34adc4e2e. 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/USDBB0601232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2a5cd67865400589beeaa958c6637f1078560f0efa075c8e0e6f25d2871d7d. 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/USDBB0990090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e76af51f588da1503b45e94d95bed4e1c2db3a71dadf81fb7d846517c9c4312. 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/US78T0505954.
Tito Puente Swings & Vicentico Valdés Sings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ff6308ce74d5ef32596808e3790e65069b617513d6047dd5136dafa33dbb0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDBB0601462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa1b6c5425704fa69782646ede9c604651a470f060d32554bcb8426199549da. 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/USDBB0610740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa0afbc350c00cbb83f68852a3dcee7eef78b768f9df80716a044375ac8b01a. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USDBB0610741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2364226876870fae500c31042892fea5e72161b5d16418228369f09275d09301. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US78T0504903.