Pedro Concepción was a Filipino lawyer and was the first chairman of the Philippine election commission, the COMELEC. COMELEC On August 22, 1940, the National Assembly moved for the passage of Common
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 0x09e66ce290610a9c54f9164b8a363c6d5807be10cd354f4c4d91b6041ee7c549. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9a464c7-2752-472b-9364-8b785f798e14.json and https://artists.proofprofile.net/proofs/artist/e9a464c7-2752-472b-9364-8b785f798e14.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 0xb43e4672ff44873a54de820bf54a1c0f773b879acd31f571a18c9b9e9ea5902c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH0871267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c06e9108f6be88114500f462b5171a8039e58715f8b1f096a6877c0c3e25023. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH0871268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811d3bdad505cebfc9b6568861b5e4d2a0920dda302904ecd2a12f0b933d432c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USCGH0871269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98d18b7a290115c31935d33b0abbe1d4ce686dfd0312039da5d5c05d32a844c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH0871270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5040ce462afa9d019fbed76961e19a14e5628aa7b28f333779cf9f6364774a92. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/USCGH0871271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba94066555969b37a08b669d66156db2c809e0004bbe6ed7656313a32558b2e7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH0871272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4f12144c30b5d153447c7213a48efdf2fdf5d07397a86dad5f4bd6f37759c3. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/USCGH0871273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacde6dc0ab1ee481bb9f2a36a0175ac173004e5233aaba5c1bbf58bb7649026a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USCGH0871274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac8ef6fa32e0c9f95e2c1a8dff5da205918a96f6d3a029ceefcc2fa2a50e2e2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH0871275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a67ac2762a733fef8dfa46a934cc65c947dcbd073a8fa3b750acb8fa86f2d51. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USCGH0871276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd910f446aeb6ac5049a30b3f504afbdbef9036f4a18f5d714bfeac43d4ad3e70. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH0871277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8373e17010c955f423855c3059c9fc69dc8c12c4eb379087133dc739d4448ddb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH0871278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca9b62dab407ae27fa77c9211be337eadf8b3dc316f7725cb01d96d1b094af5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM90848806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f29bb0447cee794cfff6664aeda7581198916b1aaeef245ed37a34155c18548. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USHM90848807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565faea88d1cafe3b88010002514d7a43d044f47e530d3612808730487362dc6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM90848808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9c731d3bb2aa77ddfd8eaf9ccd09db157f73700e7acfdee85f123c019dc86a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USHM90848809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9e883de61d851ecd9d42e25e9402839679a7dc1bb8bff6e0e12297a575d890. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USHM90848810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641d35c177b3088c704e85ffbc0a7a02bd75197f069b0ccc52acd9568c2640e6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM90848811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3233060b8605691ab3a9acac929a802842cebfe291ce843b911c43dba573bb94. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USHM90848812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb505bece04f585185e58b5858fe96a8a4703910030a3438df4c5644d07be7d9. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/USHM90848813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c158cce82a29bc3df07598b6289661ce72e9b98de28f3012a00297e9c92e03. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM90848814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c02ca11d53328bb04878dd0c8d72b2848cdcdf509db4305c1da12d3c0f13fd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM90848815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b1fcc42fffe5b247eecea643548208c6562b0940a01e490563cd78a1e086ff. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM90848816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c3e79f5a555b7d64d019825e32d064fdb14c0215ca4e117ac23e72b8f3f509. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USHM90848817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b51cb6febb390a9be16703aa12f8ca775a8549648f92d132e5e706500728ccb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USHM81137120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9945e57729436c08f6dd2adad088c2c7be45420fcfdf1dc9a31ba5b5439e32. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USHM81137121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c107f4e7f16d0a290a0d34a8f5e44de71e21b9b0c24af9a95a5a132db2dd802. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USHM81137122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4864adafb61ded770669665f4112ff65d28f4fb70d5a486d51097fa25970974a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM81137123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db8749d8259041f69e035d4e95253dd91d659f981fc1a52d9da63b9100dd08d. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USHM81137125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3da5ad016d812aa54a36f84d068c2da98a688f8bcd0f8d9409593ce1c0e21d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM81137127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2dd972194e8f9b8cb8c9194f813fb036a95b8d49d6eeeed051a903dc7d7871. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM81137128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd930e3c011fe5f1ef27cb0af1fcd7f3f294deadb9e032ef42ad03196e45670ae. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM81137129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b0ee45c80855bbc391cf92044cdd81c63cc63773871c5cf49b392713ab2d7f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USHM81137130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3b3e47f5fd8b7b255fe5519259556c18db84819c927fd282071ad44e0a80fa. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM81137131.