Víctor Guillermo "Yomo" Toro (26 July 1933 – 30 June 2012) was a Puerto Rican left-handed guitarist and cuatro player. Known internationally as "The King of the Cuatro," Toro recorded over 150 albums
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 0x831079a54e79419f21ca0315581be18e79faea0518c09bf3f89b2863d13c5ea5. 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/520008de-cdfb-4a73-ab16-1c118005cc5a.json and https://artists.proofprofile.net/proofs/artist/520008de-cdfb-4a73-ab16-1c118005cc5a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7f1ee4785ea7225b966904f9e3f0bd79defe58371c68421363041084d400f2. 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/USDBB0605410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3310afb01b9a2f46e002f5da918d3cbc81fc586641e7e0d20af6ebc47124c1f0. 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/USDBB0601330.
Popurrí Navideño / Estrella De Oriente (De Tierras Lejanas) / Noche De Paz / La Virgen María / La Tierra Mía
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5717c7fedf30b12ba4feb969e26a37c7c264ee025f5f6c35a0c8152184ea6bc1. 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/USDBB0606159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c066b271b031cce47a2208ede1e3f6f5340b88182172061a7ef8b95690533d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USDBB0606672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9324bd0727fe3120dcb68adf35c3d20783549f347bd654cac8286a080f23048d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USDBB0601693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30e49ffb730c774b53e4b2b71b4b46a93650b2b7a0da0e3c4c64df3f95e5d71. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USDBB0600885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c5f0e92166d55ac0de717259e33d4842f4bb3ccabcea1b58c315033c920860. 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/USDBB0600797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062284dc11f755c6ab9ef60601f0b199a93df94daff7672735ed10a1b4f087f. 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/USDBB0604226.
Pescao (Popurri Sambao): Si Se Quema El Monte / Coje El Pandero / Pescao (Samba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6ecfe0d95732d085b6e394dc9892a68b6d3c056eadd243f9d13faeea9dc2e9. 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/USDBB0609374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3295b12e6e5c4ab6d7eb683ae40ac0f72a2eb288afa66705374b0549a0e7fcad. 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/USDBB0606282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccd6edd66522bd0da68de4d0c1253e842b19cda4bbc76d2ff56f97d5a5b5443. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USDBB0605455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5c5d807ee99dd726b9074362a19cd58fc8648389edd630f34a86cf4f9a1503. 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/USDBB0600724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cfd353a055ede3ac419317affd95b6fffa9ea52579848d0769f4ddd8eccad9. 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/USDBB0609716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6445a60c2ab1dfb9692eae18c2d976b8bada6e9b86f3f0f43b084d1e139254fe. 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/USDBB0606077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485de4958be7f8f9dfb568a7e629cdf9decc0ab60e93a4d34ef2c0b7afb29e6d. 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/USDBB0607005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dca7960700e40ad842b801d1651eb796c542bd4a413cffcf9ce77663fa0a7d7. 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/USDBB0608519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef87307ea0d7326847142cff1e528aaa7ab018f4c21b204629cb5de44e0f469. 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/QMDA61340754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2023ed561b7004528f1a1fc9fbe4ca4156f423390b09db08244504a227cbbf72. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USBN24900617.
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