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 0x948eb2c5969c2db97cd0a2c273f0fd610784ba8bb91c4e068f4c8a96344346e4. 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/562620a9-0c89-49ed-910d-54a290061ba3.json and https://artists.proofprofile.net/proofs/artist/562620a9-0c89-49ed-910d-54a290061ba3.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 0x6cdcffd51889cf357d979b913de2097d9a335643a27499ca9ced9c8e90510e11. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ZAIC31800133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315492d5b2d538d7303b53ea10c5cb0a4c15cdc561c665c21cc4dd16aa849ad6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZAIC31800142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f9047199d545abed31fd7d8e7f08d9b2b39c53520d4eb893131e95426ff39c. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ZAC059600135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97096c2cb7a9dca1b247bb49dad956630e7c75ac118cb9944ec7090d72622d37. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ZAC059600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0dcb42befc6be75e589caaa392b8f394cdc1cfe7c4dc4732c3410aa654f2be. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZAIC31800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe072eb2f125f0dc7fe6c8e0ac716251f8e7f0d0d1e3b38a01015eb7d65043745. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ZAIC31800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea0f20f2f174a73968b25b6f6cb42507642e4511e7f493c65a569e16837ca05. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ZAIC31800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787a40c2549ea7feb2f64c316b555c0e45f6114730b295cbe39cff4c37329db1. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/ZAIC31800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe397fe41f0e74f2882dd319c605b5e116161a425c894d65d3a721100855a6a95. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ZAIC31800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51b4a479a9bf8f7192aca26562364832f9e6a760a43b2d2063ab4cd2f65aef4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZAIC31800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d36f9d9586229ccab1bf7c586baf1f980b44e89a562cb05f67bf18bbba235ee. 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/ZAC050100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3aaa9ae677e53d0a9acc8c961d923853525eb51e20e75b3f628ca36fabea60. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZAC050100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dd24a683d5efe56dc1f21575fdce256844193dbed8a5ff4564738da06a2014. 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/ZAIC31800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a9ce8039c39170c89eb498dee1fb649d003b70dff70d01db6ed693aa7b335a. 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/ZAIC31800146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255a7433307c866f7c5a09832398f1891ecaacc1051fdf4316e12e079fce64e8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZAIC31800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4915a4a9199289d27a856c9c09e4e51d0011b5e58d8c5ec78fe005796586ad4d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZAIC31800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3037cb7dbc5c181769b02945809a28d4fd85a12d391c32305cc32489753f5eff. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USA560940963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df6bfbee0428bf9c631ce5b0a8660c2c4c292264d6ef9171b4097b25b6b0565. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA560940964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c4301de444d7c9191dcc1978aad4a2de080150d1b026f9506714214999e5c7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA560940965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284c30662a53c89330fd41b39c5b6b2b6f192429bf951091c9114e80c286791c. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/USA560940966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92ec751bf1a3e854b62af02a67d6a8ec03f9809fd4fc5952aee24b77192f68. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/ZA1C31800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f272cf416a84edc1b306b08d712968ff16887fc891ae98dc4c145771b6d5bb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ZAIC31800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830f7ac16003f1b4a2ef8a48be3ed2ebc66d35e06a837d4c15e79c628203af95. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ZA1C31800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6076adf0c5cda34dd625dfa6186496c6dbbc5836eda4d0bb02c5744da5f04383. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZA1C31800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b72061eb527e420c85ad030d5cd4e0ddcbb9a6621e045578c4c3b5b6a157067. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ZA1C31800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d65eab8d675ece389671369bc032ed5c172fee46033d842d4a31bdf7b71b579. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ZAIC31800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a87a54eb0d32ebf4849df791f78166cee574fc2c2da19f1cbf100f8c4c182c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZA1C31800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7106d5919ab926b09605e4e7106a0d5d2787d11101ac6c8fa8e37dbce11b9398. 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/ZA1C31800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e20d3ec031dd7ced941ef9058c4669773a8aab3149f4ec527fe83283bc4b11. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ZA1C31800013.
Tsiki Tsiki (DJ Stokie & Loxion Deep Remix)
Tonight (feat. Holly Rey & Mdu Masilela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f8950d425e968ac869ad711b2ccf334c03b8a3527e2da3890fba6f5a8222cd. 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/ZAA011900231.
4 The Kulture (feat. Busiswa & Mdu Masilela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c581d35577832402c6acfddcf2df03e24d22e13e672988b400f079d7771f0af. 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/ZAA011900233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c8f2da616d7eff966db0f20527c207cd0b6e288cecdf1b0a4cfd83509e447e. 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/ZAA011900238.
4 The Kulture (Radio edit) (feat. Busiswa & Mdu Masilela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae6d80d8b8d7484420925932ff6d6efe85b434cab84c58dffaba662bc5bff09. 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/ZAA011900245.
Tonight (Radio edit) (feat. Holly Rey & Mdu Masilela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44160386bb4b3d0c0026ac9bd73196406c1175ed1c8a79355edb89630237c2ea. 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/ZAA011900247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e08c47714de34607b29981a92c7491f20fe65cacf897e69b2823cf115a11e4d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ZAIC31800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41970da203160e839e87b064ace666e35ec8753e044fad57359f388bb0e6da8d. 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/ZAA020400523.