Pablo Milanés Arias (24 February 1943 – 22 November 2022) was a Cuban guitar player and singer. He was one of the founders of the Cuban nueva trova, along with Silvio Rodríguez and Noel Nicola. His mu
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 0x2962c59220d1be2544d2efd26aedfdfe6f8097ec78228b1ca1485e0025f32beb. 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/3c160ceb-661b-4ead-a426-0195107d2581.json and https://artists.proofprofile.net/proofs/artist/3c160ceb-661b-4ead-a426-0195107d2581.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 0x430f97726f4f5038d6e44b2a5c76a8a4f86b021353c26f5ab73298ae9b416924. 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/USUL19700681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7862b07866ff1f6b45a2b7473e6bd2e4de11f058a2bc4e92c9f3e2cab888678f. 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/USUL19700682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f385d5f17b3d5c16162de38bc76d52e3b985ded45902ed6c83c187da97465cb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5702002633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe461d9cd38f0632bec2be66052a3ff921d8f48002ad08889ee19f3443d2f2b7f. 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/ES5702101709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0ce138490b348f043408ef280f693181b36d8acd8033e62dac5c8005b2cf0d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUL19700685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68f1ba1cb4cc84bbeccf1e809f57f1f18fd380ad520c76216526bd030df70d7. 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/MXF119906058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a3840fda8061b2c98ef9d2c6722e96fa3873dd22c8ba0151ba60d2dd1ad41e. 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/USUL19700687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1707099ab923948acab098cc53080a4fd1affe66f4a78126976e48d0214d42a. 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/MXF119906055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a340ba5c57b05bd96d4909b5a09a7cb602111c5e7389a84c85aa5e8efec3e0. 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/ES5702002639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d905c17dca1fc81464b7355912dc3eb2eaf992740f8073bc716d8e4bd3cb41. 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/ES5021400605.
Como la Nube Se Impone al Sol (feat. Pablo Milanés)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82450db9f05255547ab8318a3f9bafa83cc43dd728efc8f9d6a564bc79455b31. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHZ51905539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62fd26e3c98e82fa6c23762a205a4d24c913e455f522af15c74e7b97a65aff. 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/QMBZ91578625.
Los Momentos 50 Años (Tributo a Eduardo Gatti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc6c57ef8cb949073780499eb9de70ecbe446d3ab5e7e20900669d2f4a48497. 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/ES71G2100949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964a9bf077d68189798f7bbbd91b8ecdf9ff10ec88603092e3039a3aab3056cf. 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/CAPF61900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964a9bf077d68189798f7bbbd91b8ecdf9ff10ec88603092e3039a3aab3056cf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAPF61900012.