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 0x573566d0429d92623925d8b083ff0a7f8b3e43602093212b74d46364310dc9f4. 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/f408fdfc-a79b-42b3-8895-8a0b2216037d.json and https://artists.proofprofile.net/proofs/artist/f408fdfc-a79b-42b3-8895-8a0b2216037d.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 0xf09c1fe915fef5febf59ac0db0243a5b515d3bd2ed92991e7f12a174862f4cee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ZA82Y2000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09c1fe915fef5febf59ac0db0243a5b515d3bd2ed92991e7f12a174862f4cee. 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/ZA82Y2000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d4e568e446cf3139a3d2e387d837a131c5000a2192bc7834df8f2e1c1b48f. 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/ZA82Y2000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc194a5c15b5350c4f6fe1b6d286a5e55ad80d45947d9be6f929ca5aaa23db1f. 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/ZA82Y2000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774aa1abf2a4cbb9a0092d387e5e390a4471f38902ab9d4594ec9635c3ca9414. 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/ZA82Y2000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae0807de42763bb7c44c9032cd9f3c76aae355c3b642ce137675f2bc9d7aef5. 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/ZA82Y2000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8beddf44e29c17540d2ec8a3d2b7931d849ac5f217cec48abf59b9f7d4231a. 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/ZA82Y2000195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b15da69fe695fcbadabe85dd20cc863969d75a47ac005e036ba3deddb04e12. 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/ZA82Y2000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ad7270cc78f6fa2289d376ca427ed1ad33ee90c3623547a13fa2c0bbef40d7. 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/ZA82Y2000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871c59562bc00e7a8620c9855d8b88b1a02c856ce1fcfeaa5f0a816ec712266d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/ZA82Y2000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628efc7cbfd88de0bc6783b0c5b1fc9f7a43aab39ddcdc739966ae3427f260f4. 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/ZA82Y2000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0b5b18268fa7564a45a9e7c9e4d25da135feb4acb6d6cf439b86ec92785f39. 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/ZA82Y2000202.
Idlozi Lami (feat. Nkosazana and DJ FreeTz)
Mang'Dakiwe Remix (feat. Dj Obza, Bongo Beats, Makhadzi, Leon Lee and Mr Brown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202a7630f300c7c390236a03c4af16d2a095bc7a2e61e7062917cae81e8eb833. 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/ZA82Y2100093.
Uthando Lwami (feat. Mduduzi Ncube and Mvzzle)
Sthandwa'sam (feat. Mthandazo Gatya and Dj Gizo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e98b3d29a39eb72c413ff45563b1cfbdd1db45d86baafefee273296611b9f7. 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/ZA82Y2100345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73621a95f0df1e1453def6683cb12a4edf5b2ef2dc5f781707524dfd82782a9. 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/ZA82Y2100346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48f1331c470539a3fc7618af0f6f3bd21bbd80234c5fa19291ce7f83ccf5955. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA82Y2100296.
Uzobuya (feat. Koki Riba and Muungu Queen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c00f13c28efba389137c100981fd30b4bdbb07667b276932ec9e571a447b95. 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/ZA82Y2100347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04ff6eda9d8bf9150419369b3dc93a8f6b789962eb14a872939b8cd51ba0869. 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/ZA82Y2100351.
Lazaro (Muteuro) [feat. Gemvalley Musiq and Mr Brown]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925d36f22346b7e7da3953c6277f75af87b5599e33dac66f127f6f47804d2cdb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:31:32Z), 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/ZA82Y2100354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fbdd72befd4bc9361c3d35d209713a65e851719f033851f85a9fedd0bdffbd. 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/ZA82Y2100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd587053396fd191a53af11a2208bcc97b01a4f47a7886fbd26a4c72aeb1c0a18. 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/ZA82Y2200106.
Sivusa Abalele (feat. Nkosazana & Master KG)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6352b6fd7d33aa0cf40c2dc6083602e8f7a210179b71da993d21776cae20eef0. 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/ZA56E2420026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d95f2fffe8ef25372825806cf5a9bcf8839bc7d4dfbc1b021166e22956de0c0. 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/QM7282109662.