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 0xb2936f12e08e5d2cd719b7a5740f115137650659ad6c174be91815ce85eb33f2. 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/42f2f1ff-9e58-46fc-98ef-32bc4dbf0dd8.json and https://artists.proofprofile.net/proofs/artist/42f2f1ff-9e58-46fc-98ef-32bc4dbf0dd8.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 0x807e2b1982684ce5528e20417853e2154116e0a8571485b4a13acfeae63492b6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZAC012300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f7d9dd2b2e0a8f6d15a4c3316a90f39f55c07b2a259df86ca096105615f896. 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/ZB1OS2300232.
Wa Tshembeka (feat. Tyler ICU & Jay Sax)
Bangdlisile (feat. Mbuxx, Shaunmusiq & 2woshort)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe86d8c4aa2d84fb8269fe5dc61a2114ef8241ab6c070bf2d35f7bcefef6b55b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ZAP5S2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe86d8c4aa2d84fb8269fe5dc61a2114ef8241ab6c070bf2d35f7bcefef6b55b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ZAP5S2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad216a39aec32ad280a5038d4978e2e6349f0db9bbdaa331886cf97e7540cea4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ZA56E2301985.
Krueger 2.0 (feat. Cooper SA, Khalil Harrison)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadabf664c2660f671fd718410bc11abb2db0360549cc89e07533d20729c30319. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZA56E2301988.
Kwaziyo (feat. Ch'cco, Cooper SA and Babalwa M)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c679322626bfebb80578a55924f35b7f30552d39a73dedc96c0219f656b078f. 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/ZA56E2102238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fdcda6133efb9375f9a4f960e9c17a2b8894458a305fe6019f74487bbf88ac. 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/ZA56E2102242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1136b1bee94c1670837e87a39dc27ec90c433c69aff3edaf072d18b6839d322. 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/ZA56E2201735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb17fd8389d0331a9d7fb683d9f06f93e5b42b243cdb13e02cc19abb83d9e9d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ZBAIK2300002.
iThemba (feat. Cooper SA, Nontokozo Mkhize & Kailey Botman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed3209f7865ad21514532c319c6e399232f5ecdb3417304ca897d3c4a81ffe7. 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/ZB1OS2400392.
Uthando (feat. Cooper SA, Nontokozo Mkhize, Ceeka RSA & Carter 55)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe985f524aeddac436bc2787de26d21850fb3ad71bcfc79aef8390000953fcfc5. 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/ZB1OS2400393.
Amapiano Mix 2024 (Saxophone Edition) (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9453f8e8b486ffd3de49f9969018391561683afffd06b11c5ad2e1919ad064e2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2P2468816.
Gone (feat. Rishbeats, Cooper SA & Thatohatsi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5756f490f1971d99645cdf635fded99dd2e5fc8a0c052c3d1deb57b52d3f1d9. 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/ZBN532400051.
Thand'Owakho (feat. Cooper SA, Stixx & Zwayetoven)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7aa1e6fb9c58f10d862a4c50a891ee65d45818d2d664435fa0c4922747bc24. 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/ZBOOX2400055.
Zizojika Izinto (feat. Cooper SA, Amukelani M & Marvin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94b731f5fc3e28f91c15e50c3f3d64a64f8949efbfa5123bdecc389c59f2189. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/ZB88P2400443.
Kuhle (feat. Cooper SA, Zwayetoven, Khalil Harrison)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ddeb078f7a160fbb8bcab6a3ad7a5b7aa8bb79b0920dfbbda19081c0b88c07. 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/ZA56E2315289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f29e29a32426451fe8996dbdb230f54cc619a05faa267d8dda967b4dca2840. 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/ZA56E2527118.