Mohammed Ismail Sherif (born 9 January 2002), professionally known as Black Sherif and formerly Blacko, is a Ghanaian singer, rapper and fashion model. He initially gained popularity in 2021 with his
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 0xa8f943b3c748bf8f1811eaf79c36679997a3715c4286d9373ad78ff75628bb7c. 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/6b68e66d-9963-4173-8099-d902f9bda5b7.json and https://artists.proofprofile.net/proofs/artist/6b68e66d-9963-4173-8099-d902f9bda5b7.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 0x25d48ae9ffb7b29b0f7d5b491d4fc86093a85d6e6c4f9fecdfe7053dba138c2f. 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/USUYG1534046.
Water & Garri (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bda49dd22808303e49ca6dcbd4af6674ac907173eae0034a937bafd4dfc035. 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/USUYG1546015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409faa6b84c024eb5ae0080dd73e0f1a14523a5a6ad476113fd26a7c6cbe491e. 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/ZA41S2226343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caba6cc58ea8ae01ff22d25cad32d8197b68848bab4ec8556bb1cbc13afd8ac. 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/GBUM72203245.
Blood, Sweat & Tears (with Bas & Black Sherif feat. Kel-P)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a82410403cbf45d4b4c4681c7fe983782b3f8cac5ace2345783ec5a434850f1. 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/USUM72301522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd665987a26a4a5aa92c3582f92f9c121ef375f5463787225e04082721973777d. 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/USUM72317936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabec32e443ae9e93dc29adf609ba70007e0e6dceaf38c0239091a49bbba03b8. 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/GBAHS2101425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caba6cc58ea8ae01ff22d25cad32d8197b68848bab4ec8556bb1cbc13afd8ac. 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/GBUM72203245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a82410403cbf45d4b4c4681c7fe983782b3f8cac5ace2345783ec5a434850f1. 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/USUM72301522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabec32e443ae9e93dc29adf609ba70007e0e6dceaf38c0239091a49bbba03b8. 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/GBAHS2101425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a40e8306bc91ca633960818813353e2962e59ddc618a4919ffc096fee062f6f. 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/UKXN22233973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b94b38ac37eb5bc5bbd06526977c8d9f5e77a40e9751e415f8a91fa1235e73. 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/USUYG1446511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889589c5dc20d11c0985ccbc4233bd453a9877d01c7f8c0d49530af6b8bd6139. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USQHL2009405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59356f16ee01ea97d2f5b8ce501a09f10a65217f79a66c650913c36c34fbb3b. 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/GBUM72204532.