Fernando "Nanding" Hofileña Lopez Sr. (April 13, 1904May 26, 1993) was a Filipino statesman. A member of the influential López family of Iloilo, he served as vice president of the Philippines under P
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 0x442f241b4b633a199b0773303bc244664b9243fefae998b17b092b0fed75ec9a. 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/696d997a-e8eb-4f6c-a771-3bc4d28ddf6b.json and https://artists.proofprofile.net/proofs/artist/696d997a-e8eb-4f6c-a771-3bc4d28ddf6b.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 0xf209d6ab541291ea2c2b54a105eccf9a75f7415e6d53f8b4190c24f9deaa0b32. 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/BRG722100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a64d1dbd13ae45bf13979c74c54ac636c97111c38712bf1b557a6c80f678f85. 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/BRG722100245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd933818356f276da5bb431c1f0fb71aa9f930869278ce0b6f796c2ac4474ffbd. 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/BRG722100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe681719e3c2f1d099d83320a4a367e4204b9fa9b448d32800c0c4f8922a716c4. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BRG722100242.
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 0x2fc184fd2b222945ad252b15cf4f23b0c770b6cec72f8626b07bf4c8bdb27510. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BRG722100243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd43778ecd93be1d1b0119370339e3108c779dfec804b672901165e98d2b16. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BRG722100244.
Bona Trompete Solo (Algumas Liçoes Tocadas e Harmonizadas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47844955fbae6bd11bdb77182bba9178514add5cdd7c1ce4282c9e2a5098961f. 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/BRG722300353.
Hermanos , Arriba ! (Hinos De Louvor a Deus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23b489a70cffcf657963ec23ab1b9f0bf3afab32007951a8d26285dfaa80248. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/BRG722300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf373e96348db05afab906eb9e37b36793d0b67cc811c211b1774bd05509e36b5. 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/BRG722300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eea84625f6ab03cc863bd745084555e7b13f0e41991313404d07963f145e073. 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/BRG722300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00026c245f993fe670ee81bcd998535e0ed482bf5c28a9229aaea1fe6667119. 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/BRG722300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef026dc28166b14346d0bf14f20c95c40015219b3d77fafb61046cf4eae98d45. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRG722300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0233338893f1b960a600b8ce4f868ad9b17f1c4aa3e4171f212563ecb8532961. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/BRG722300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad33ca5f6667a93b11b3247ccb3be202f206c1f54dbd7eca522569abdf8e7d4c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRG722300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761c1cd7af0f4912fde5aac43df608d5472d21bd0000e027fb01731c7bcafe21. 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/BRG722200567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0fe38bf534897053264571316a2e7591f25f6d5f0ce595074c56387250f24b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRG722200562.
Hinos (Trompete/Acordeon/Violão/Bandolin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd4c047cab92dac59aff4ea87dc9452638ea72b45e948d69a4c9ce54980c4ae. 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/BRG722200450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425be60901e468bb53c07e69ae3ea6ee4b8bc3db70fc5b1d2ceaee266fc5dc1c. 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/BRG722200392.
Esperança Em Jesus (Hinos - Trompete Solo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6122cc598b8c5ef4b0d97d8cd3ec949f1cb521600923262c1191a9671d25123. 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/BRG722200351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1193eba425e405fc745fd15979c246a0538a20c7587e53fa9a881d3c4e6402. 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/NLRD52200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fcc87ed3968cda22304ae08d5a0b9bddac0a9a389591c198d0d7a5bcba58ac. 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/BRG722400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556cefda7266e12096491c17999fc7c20a62bb692f8f7d419d05f077cb4e5fb5. 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/BRG722400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f5252ff5345e6ab6df3a4bc92631142012da4025096c35362b62c7af247feb. 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/BRG722400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6805f82b3c6cc12639c9eec928f5ba601c7c56e78f0d1fbe0334aeda1e8b8466. 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/BRG722400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae6dd8d147b22719392d1ff749866c5a21b8883228e3d17b3506b3c2c335ca. 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/BRG722400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02992eae5f62753fdb90255ec104b2a55dc97dcbac5b9928c5d2598a58f4a21b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:10:07Z), 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/BRG722400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb1a9d4cacadec9e850a4c9b6f895032885754e7de6925e6519eaeeec3533d9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRG722400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd63cf88527e98844f578f8b90e2423b1684aeaa57d02fdff789200c75e6e1e6. 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/BRG722400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc4782a6ca2c106ccb6988a0552da6b910f017c998588bdc3e5bd8f7717dfb8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRG722400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a34393abc4f216d1922eb9dc1c5db4e79fb7653608fc644d34fbd4b7c629df. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRG722400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0903d0150e57d41a0c5ce84ddcaf057fd7cdfb14e75d8764652888d7202b7c63. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRG722400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d55582447424549cb7a7b13fb173b5e39d264147926205877f739c3d57ac84d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRG722400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029366dd32ac0b86d0c6ffbc3a14b8cba6d785c89b002b21b54fb4fc802ab75e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRG722400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b162ac69bb8b245732355992873f32da42ae78642f90fd02392d97fb5937a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRG722400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe391750c484b3cfb3075b7eb1cee7dc2ed8e9de07760b3e054d19ee790d4ad2d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRG722400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36a36cf41123fedbb1f9e96f09a551e50bda378f7c91a073de8807bd3d6a34f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRG722400233.