Silva is a surname of Portuguese or Galician origin which is widespread in the Portuguese-speaking countriesSaiba quais são os 3 sobrenomes mais comuns em 64 diferentes países. .© 2005 SOCIEDADE PORTU
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 0xde6f5725a39fcc8b71dea45e6d41cd52f5254f2fdb39f88d31466030c78e1ea9. 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/35b4c8c9-8970-45ba-9a3f-9c94213bbb36.json and https://artists.proofprofile.net/proofs/artist/35b4c8c9-8970-45ba-9a3f-9c94213bbb36.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 0x190ba86e9f7459e608fcf205b39731bb3dfa2950bd3791cfb86ab93539cb688f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRRGE2300493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7f217d78793cc8fda1c276032bf1c82441a22bf811141a446134b82f44a4ac. 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/BRRGE2300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571fe828ba241794f75149691132e23c373f524363a11cf38387b1c111bc1e63. 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/BRRGE2300487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d784baaed55cbca843b3f737f331603d008cd4c5b30462e0a800c9d1235b30d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRRGE2300491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84aa5f3b1fcc9f85ac4155d74835c3c6c44ec430239cb156028b107e951a04f. 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/BRRGE1806499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3466d1e22a663f60c2e4ab4761d8b72af6932398b0b8de31fb62d76111d14f7. 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/BRRGE1300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3466d1e22a663f60c2e4ab4761d8b72af6932398b0b8de31fb62d76111d14f7. 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/BRRGE1300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84de0b99562dc264f139b96a5a67569c8c319359a11a0b4db254165d8edce841. 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/BXK142100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf828d7b10c6a379d207d6bbbf14a6bd727d7b61332375c71a930ce6dc77283f. 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/BRRGE2400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c601ddc8be1393755b3d4769b6d83cd4bbe375ee018761f879c73799356d067. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BR2191500812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2606be90a439b71dc676e8074b1886750842c25e4aee3d71462f84e98f20313. 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/BRRGE1812678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f85c74cc0a55f13e489b4fe34e33f05e301996004ad734f919c982297bb4eb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRPUI2000248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b81f23301eb85cdf7126507ad28a6ac6b0b1e80667de4f0b66d00651f0dbea6. 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/BRRGE1703802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f02c903d78989977aa356190c2e338498b24e8fcf46464f98e11a8ffee68a1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRTRB1300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81baa959063d81ea51d6f4467942b43e32211109ea869b963c436ddf34d62f89. 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/BRRGE2300593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b4f4ce72ee43ccceaf223b50604744dff22560f94b97451318a93108123303. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BRRGE1403332.