Efosa is a given name. Notable people with the name include: Efosa Eguakun (born 1986), Nigerian footballer Efosa Ojomo (), Nigerian author
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 0x03e003be4994ebc1dc869583880e54ad71a9a17612d856c762cbb14b20da7332. 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/d210d4ad-488d-40e9-bff4-29d56344dbc0.json and https://artists.proofprofile.net/proofs/artist/d210d4ad-488d-40e9-bff4-29d56344dbc0.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 0xca2ac9bc11994d05f8a735cf25df15fa0e94f0cac41d8670f3d1f187b7bf3262. 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/GX3Q92435999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c1bdb2f50064b6c80cc91750ee321c845801afa967585abe4e2ac4ad785130. 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/QZES92416551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee73d8f896fdd2f55f46bd8010d1aa285ed8a8d3a98e7bd03eaa03f68942c55. 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/QZWFQ2340900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf95eff57b2484612a5e26ef57ce8eb8aff1ed2deb55f34eb4da4ca9f004ff1. 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/QZTAZ2323880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586120ab96054caa2ef7cc338de456f2faaacdc50fa1f9f1d9823993cd1845ef. 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/QZNWS2338143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63fff4ef9d089fa5908a471679c485c06c8d58f83c77711ecc6571ba5e9f090. 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/QZHNB2397001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d8762cba28e32bca9829db827686e9e8d3a664019903a228e69c2ca079bb55. 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/QZNWW2249309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1751a8932edacf640b16d8f58ca8128d1a7f6125a3a1f00503ff77f2533366. 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/AUMEV2253104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc461bce881ea34d84fa32524a97232edd9aa2d050de921785c9d33ecf7a73c0a. 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/QZHN62215829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f88b687a3ad7e7aa6bedbf8d6b0b3befdffffb27cb5fba3b45a35b64c6d7e3b. 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/QZES72291484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10ff1ee28861738818ee5dc48f90b77b814b357abfc215bdbce95f3f8788033. 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/QZDA42237443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d71db482a7a7a6c1407877c893fc26507b47682988fa92d441bd90e8a453b24. 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/QZDA42237444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdfdfb6750826f5e50fa5c295095b42029b7d78d8ef22625378b1ce2ed6f1fc. 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/QZTAS2120821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81184c639acb60f4981df2444f59164dbfb49f23e7b960614c804d022b81d939. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNWS2184734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec5064d4cad7f0932d188385c184e07ef7d9c6063036919a6299346711a7e0b. 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/QZNWS2184735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadefa90e1e569e53f04f4a9cd3efd7169a33f2fe360413f4cf1945f2a245eb14. 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/QZK6G2111241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94fb389a701520f94f4afa70fea57572ea652e1691fc8a5b42cc628a74eed56. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:05:10Z), 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/UKW3Z2100754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486738394a88808920ac29a9d0c7047167b6e5d520a821b8b023544d105c4214. 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/GBMA22191856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ee55ba47ba5420fdbafac469abeec73ea34773712c777bb1b6bb1b12913f41. 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/QZDA42125964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcdfaaf8de7be66f5fa3f416691fd1493bfeb5b0d2a0dc62d620e6fb28875d3. 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/QZFYY2187743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc574b3d9b057edab27036f95d8d9f512c4eea4105273f17fcc4fbfb7b2da0db9. 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/QZNWS2079984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5afa7854a3df7db91893c5d3970ea5724c6119a85708c39048f7661946f9ef5. 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/QZK6G2011470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6f1b2d3c5ecead2477c7291553a8797411ab02abba5cd7e4621b5d4aea095d. 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/QZHNC2067535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339218f6c704cd77b6da93a0a085c9bd5d76bd3fa2ff1a2a65b5c67c596dcd79. 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/QZFZ32008194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9f4b625052a6c662fd70391807db70d3280d759ce169a52ec172ada854c35d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:21:02Z), 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/QZFYW2021886.