Noel Nicola (October 7, 1946 - August 7, 2005 in Havana, Cuba) was a Cuban singer-songwriter and founder of the Cuban nueva trova, along with Silvio Rodríguez, Pablo Milanés, Vicente Feliú Miranda and
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 0x1bef8db47330084d2d2cab2f3d2d2fcb71a19392f8fd74b1f0f5a5f6ba73f18e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28a37382-9643-43bf-8136-ba0801988533.json and https://artists.proofprofile.net/proofs/artist/28a37382-9643-43bf-8136-ba0801988533.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Colección Nos Queda Su Canción, Vol. 7: Dame Mi Voz
Colección Nos Queda Su Canción, Vol. 8: Entre Otros
Colección Nos Queda Su Canción, Vol. 3: Lejanías
Colección Nos Queda Su Canción, Vol. 4: Noel Nicola Canta a César Vallejos
Colección Nos Queda Su Canción, Vol. 2: Así Soy Yo
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 0xfa2ffbf6caa8fc027ef67fb31319d3da316eeec2a191926e6606d65fb8c1f20c. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/CUA0B1801028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5afb93f82184cacdc90fa1fd22ed99c4e33e0ddbdf8cf953d4254e3cad10ac. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CUA0B1801038.
Colección Nos Queda Su Canción, Vol. 1: Comienzo del Día
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe07edd207ad60f3f07fcfb610832c0c9457183b2dd448bd0dd0f2ac8adc925. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CUA0B1801010.
Colección Nos Queda Su Canción, Vol. 5: Tricolor
Colección Nos Queda Su Canción, Vol. 6: Ánimo Trovador
Cancion Protesta: Protest Songs of Latin America
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052cd810a327029f2a1315eae1d717b9b3b83c19f9336ca1d744cd7b991d7444. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USSF17000119.
Johnny, No Sabe Porque (Johnny, Don't You Know Why?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeba2c583833a5838465ec558a31de1aaf68496f158b8e3462082270001ea361. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USSF17000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272f88dc6db62f4934905e0d326b3cd8df347023a250026fd6f75eae93e0adda. 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/ES6100678066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c839f68709535a818d61da5ae40f0184643ad5b05889dc77983293f76a85dc. 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/ARG991011014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c2c10100295de32e9990b34d1767418023f2561cb1c9dca4ca00fc1d0414ac. 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/MXF600603018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054137db72c841e4be7d1f333affc9165f21a9110477b255188a7716af492125. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QMBZ91323273.
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
Canción de la Ceiba y el Arroyo (with Noel Nicola) - Remasterizado
Este Árbol Que Sembramos (Remasterizado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ae5fa4fcbb53ef7a2e2362ebecd9fdc1d06a48567537dc3177cf2f8b621a5. 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/ES5021602506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979390c2339c0f12fadcb6e16a940e9bd34af5f4fbf2cb1b1874a0bb049b3919. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBMEZ1545083.