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 0xefd3bc39f7b6dcde8ab1243406a3f90d02327fa19865c58214ee9f368fd49400. 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/ef623cb0-9e69-4e19-9538-f1ed94e8f8e0.json and https://artists.proofprofile.net/proofs/artist/ef623cb0-9e69-4e19-9538-f1ed94e8f8e0.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 0xc82cf42bf600004a6f7fb42baf6173a94d8ff9b826882735fdf1378cc612e15d. 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/ZA56E2415996.
Suka Emabhozeni (feat. Tumelo ZA & Blacko SA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a1e1441dcfd7c7e9d0f3ee6cd0c8f52b9a9f702dc914e59bddfed0b0e51efe. 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/ZA56E2419939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf504c80564cd0236808263ca13aea6ebab611cf4e08a1dd5a4d631cdb6c49bce. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/ZA56E2420317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe7034a54f9eff0f3e052362bf18d99c55fa8cec0844eef8718dc0d6b1c1940. 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/ZA56E2420319.
Embhedeni (feat. CowBoii & Tzzy Makhathaza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa953988bbfc3e10266a415f830c36f2bc95dc2398e61012feb5d89dc6d479702. 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/ZA56E2420321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6a3bd85d235441c4aa83c5e133c62d6663d0b72e399569124ae782a007e15e. 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/ZAUM72400564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d450896e309a82e5fb3919f73ded33ccfde6e0acfd3081fb5fbeae8739930bd. 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/ZAA012400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847f73a441fd75b6f8868596f76d2a0d507d41afdf956d2c55833b20e21a86b9. 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/ZBC042400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9e301e9e02174073ef39d08d277ba397f1c26f2dee66d413958ae2725a0382. 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/ZBC042400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9839626a0a5308ac5c05eac0803a4bb463b81d08f86015bbb6dce584ef2db3c4. 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/ZBC042400008.
Danko (feat. TitoM, Yuppe, PRVIS3, Eltee & Senjay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15a4ffb4a667e6a4ab2318b87662eb1b478f6be01735be0b26add2d5e325bdd. 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/ZA34K2402154.
Iskweletu (feat. Eltee, Leemckrazy & Abuti itu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0620318287cab99448c5a31dc8687d02b4348d27314ad41bb8fe294d480cdba9. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USUYG1572554.
Endofaya (feat. Eltee, Springle, ChocoDynasty & Mankay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa9742a08aba7f889f0d3c94b9e737983b941d7b026222b994855052b2a6e24. 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/USUYG1572560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61b4d0d22b5365f10ab22b8a4b1743729f731a811b7d91e556e18a1a6cb5e3c. 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/ZAA012400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ba5745a8245ce00d2c6d866b15e9d2f9e2cbddb9bbd7bd43699ef72127c984. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ZAA012400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6ceb90ccc2c6d4905c7da4a36da51ad5c5e8c14601987d3293c1a447eebbf6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZA56E2416989.
Goni (feat. Tumelo.za & Khalil Harrison)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9553b2e8935f125ec9cc4f6f3ba8eeda34f6a2dbdbb8f8d66ec54d7d6a46988c. 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/ZA56E2420529.
Ewe (feat. Nobantu Vilakazi, Eltee, Rea Da Soul, Tonic Blue & Skyywalker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155702a25eafabe3584d5dd4a4aef8dd0b78540c6bd0b586dbb909870a59be26. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ZA56E2420533.
Mdantso (feat. Leemackrazy, Thebuu, Eltee & Skyywalker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f59115c7e3bbb16a31b84b3975a3a56e22bae7781a60d0456c66dab841be882. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ZA56E2420535.
Imisebenzi (feat. Eltee & LastBornDiroba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8117a11b0e33aa44bc8f00de8842727b81deced7e53bde7d1dd230cb345399bc. 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/ZA56E2420538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6008a7c97496c401e2d3f2c2ca578f9721fdce5876ae525a85971516f34e683. 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/QMDA72435483.