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 0x55e2749d32c12968a72f1a896ff945919fa4f99a1933240fdf4ae6e08e7cdf8c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/748b383a-98c4-4a2d-b949-cf0468120ebd.json and https://artists.proofprofile.net/proofs/artist/748b383a-98c4-4a2d-b949-cf0468120ebd.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 0x7ebb9d99d160f654c9d61d1c0de697f6050814ed568f683a3b2c78f3ee20f8ce. 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/ZA56E2314894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28f83eac543fdd945b162f5c4df49c76e0a04ccda2beaff1354cd7a9ad015c4. 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/ZA56E2314895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2879b6797ec182c98940c512a200bf84d31a0cec8fa7f86e7aa4411b114a315. 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/ZA56E2416473.
Mfazi Wephepha (feat. Big Zulu & Zee Nxumalo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda10b76f7467d6114a4107ea34ac9ee61dcd343c8cfabcdb851c4b63e2b83a18. 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/ZA56E2416470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746f7e3b54bf5e506a3015f4767a6409585022c4325c236689dcdcd504c3c637. 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/ZA56E2304041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83925163143ec1b31bcf4d04cddb431a6ae00ec4864a2b4196841de68fe5174c. 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/ZA56E2303671.
Sofa Silahlane (feat. Nkosazana Daughter, Lowsheen) [Remix]
Sofa Silahlane (feat. Nkosazana Daughter, Lowsheen) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656e0b2da10751ecd425fb9d77b8e3b0ceb862ac3bf96c4567786641db727e4f. 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/ZA56E2201602.
Sofa Silahlane (feat. Nkosazana Daughter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf8dbbe7ec36df00e9f5da90f613350502ad556426e82adba16c622bb7c5cbf. 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/ZA56E2200398.
Mosadi Wago Nrata (feat. Makhadzi and Zanda Zakuza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34626a8a5027da2c1903980f14db87e1f9c1bd0b33b03729246d9334e6276698. 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/ZA56E2102183.
Dali Nguwe (feat. Nkosazana Daughter, Basetsana and Obeey Amor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb94f9e6c39643a987e6bc751d4d993d7f28715616a3e8fcc97bd4f4b5c5b44e. 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/ZA56E2102175.
Ngisize Nami (feat. Nokwazi, Casswell P)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e5227fc1b3f91641697b16c4fe025fa55264a08c22a531f5a8b88fb49e4af7. 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/ZA56E2201128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf00f25dd6a4ffe2606a25a642a9beaed6727602479e13bde23f32d61623fe9. 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/ZA56E2201533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ce0afc091519f03515cc0d86f6668882e47955ca19327264b9eaedc73ebaab. 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/ZA56E2201534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b1821b4cee235f4ee92226b326116e99c37225a066e46d8ea152464147a397. 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/ZA56E2201535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b220e68e685b5864053671d066a71df1ac19f436e403a91d09aef7ca5b5878. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZA56E2201536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb3f8d66802ee3db7dfb5a3f494dd93ae006ca0800b1602fbf0398e70ca03cc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZA56E2201537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4be4c515a9f4106ff6ffebd3a3f7d879cedb199d7404f9ff8ff952bef28973b. 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/ZA56E2201538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb609727ab5ca2182e13160f82e081d20548aa466774b627b1f956a01e86fe1b. 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/ZA56E2201539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98e54b5bf3916b53d9938b5c1cca30adb60bc1e9a77c242fdc9a411d155e57c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ZA56E2201540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f743e5f0ff12fcd2ad674414f77b6dd13f633c8882e3d5872a61502d4abf5. 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/ZA56E2201541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4469896776c4349f8f063b3ac3fd490c45637877cdf5141f4f0af680d81a2b7. 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/ZA56E2201775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f2db333211356b6660fda10476dee1cbdc336a6ecf1916b701ef878495e3de. 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/ZAKCM2409227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f47110c85e9ab4cc37b22eedcff39ed572b875f983521fb2dc5e6ffbadbee2. 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/ZAKCM2409228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfd26eab8d470a3793df61d778dffefa5516c092ca55b44ea9e9c66e00cd5e9. 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/QZTV32446464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba279c943ed358b65ce2d7f2a4400c1d18fc81320c95700b4c15cada614e345. 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/ZA56E2201753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebc61d3ad7f0aec810377ee0f8368a5939c59af93ff6d99a237756c5f2f6a34. 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/ZA56E2201754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94b4687998a2930adafb786333d3d5d233ea095d29f492d9432c4b8823090a3. 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/ZA56E2201755.
Mali (feat. Makhadzi, Nkosazana Daughter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec28954ed62201b3e89e8bb991bdbf7f0937cf853f360e3ee4aac1b03da3939. 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/ZA56E2201756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5911a9baa590c79f48950e6b9252d054ea9d346868e5ed6b21f0b856579c54a. 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/ZA56E2201757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066f2d81b4a9e15a3cd62a52611808545fb87d7656161680e0d3aafa752b5f65. 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/ZA56E2201079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2733f9f74aea3bc1c98a4ca1cafc64445be24547f70a9d7dd6bd009c97a4d06. 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/QZWV32417620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0eef01ef152f4a984b93a45735b5ebe1e74fab218f46d95e8f4c2074753af4. 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/QZWV32417650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb6210a3fdd06f7e0688380965ac54eac58279f87d4cc1ad5f4312cfea68c0. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZWV32417663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd94c1b8254423f9c8492421fb8a00affeff4e39b5f234b2083e7fd7cdad0f8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEY472471697.