Umaro is a Guinea-Bissau given name. Umaro Sissoco Embaló (born 1972), 6th president of Guinea-Bissau Umaro Embaló (born 2001), Portuguese footballer Umaro, character in Final Fantasy VI
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 0x6ce2e0426f8507e7401164444805c273c645f426fa1962589479f0c85fcccde4. 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/b88226a8-c345-4844-8f4d-8b75f2ad1dd1.json and https://artists.proofprofile.net/proofs/artist/b88226a8-c345-4844-8f4d-8b75f2ad1dd1.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 0x6b91732fc02cfeb22d20b1c8139af2c81f585f8e8568e6c341672af54908d4b5. 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/FRX201955265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4108409fbcf981088165153ec15c4690bdcd5302743763167f21a112e8c746. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FRX201965507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7016979da1e542488885c3eca738beea6e853534632122e25b092e4c75ef55. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FRX281961379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d00c538a1efec5f23876d75bccc4ad0ec711492c0d1ad9b9d51ddec3a8508e1. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/FR10S2005317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006020886c83978582f1fb0ac6c22cc01d84ee3d496c465bd08cb7504f1d47d9. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/FR10S2030451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921298b64fa3cfbc5a5718f699f735bf763a0a3ebf6236494a86723bc51af932. 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/RUA1D2113752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb8dbacdef1bf635291d3839c6075d9e70613001be4d039a96f98fcffb3273c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUA1D2122989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a508bc055e8a64afdd7ac1fcb19a1183b077416a4423db84ccece6f7f9bde42. 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/RUA1D2207666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe462cfd58245c26a561de62d020ecab1a6b4f62f86928f214c0aad9a5e9dd1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/RUA1D2283395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac10bd37cb01bcce37c4534ca3d4a3de9f100610cf36eeec2b24c870ae9dbb8. 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/RUAGT2344949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9698c21f58e0d1631ff5766d29ec316132f403239b6e8755c489f820d6cb76f8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/RUAGT2373724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf98feb99874445efc6b8cd9c893d28231102e7d14f2d83c70c7a711a0935e57. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/RUA1D2486947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6997c712264821109770f2e0594d64e511ce82c7be2cb98fefbe8a3db4daa9. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/RUAGT2454759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e307e3c66d3e74f888d45381180a555ee8f97a6780f2fb410372990fb03f2ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB8KE2427826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f7cb4b947abe9ed96acfe67f0677d13332cbd4bb9e8d65b619e8666240006e. 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/GB8KE2503087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16705ea0c72563c4aee5a384d3a3ef3e2b35d0fb22ca2e4017b6cb9ce890f4c. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/RUA1D2512192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf335728a2baffd23b24f67895f839bfbae8f1a52864478bf94d498bc8ef74e51. 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/RUA1D2551982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0c48001a3e12563b29cc9c3f956322688796188adcccf5617adcc2fb70bad1. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/RUB732086121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7fe8c282e963038141dc86728c8cc0da612559502161bda14152c507c6ef02. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUB732086125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd577953d1ad63e1b194ddfde105aeaaca711491e7e416b5429e6df85c0d350. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUAGT2576233.