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 0x1230e4ce78b3a8801444ee494107e851588f32b5d29429025e4a54916a0a8e02. 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/b0b07d50-b89c-465a-8db4-68f9a1027666.json and https://artists.proofprofile.net/proofs/artist/b0b07d50-b89c-465a-8db4-68f9a1027666.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 0xd3c1797ace7757560fc9cc440f5f7313d5a6c6e4bc1d2e3e7656da0d07430e7a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ZAA641300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252a2ca1202f5d9e1c0b8c2062fc0e201c9f5a43ae0f3382ae8ccbc0ea2cb156. 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/ZAA641300298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ea13430c97b4f17b0a84f3422ca6f1de3255afae429626f3c1b044edb1f367. 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/ZAA641300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1844d1f8b7388eaf8f9ef8113235cac3264583a2d3e6a8c89704b085dd5168f0. 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/ZAA641300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff8a68951afb064066629730a75f2b02446cef473d2e0da5ab1009d488778ff. 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/ZAA641300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3157f06dd43ff07620c834693e1ab578d6a243555e1d3bced66d39a5cc103fb. 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/ZA2EH2200032.
Baleka (feat. Nokwazi, DJ Biza & Tsiki XII)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92d1f655bcd1f855017da6deb4ba741e8e2f3bd4ad04de06c5a6855b21d034c. 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/ZAA012200261.
Gomora (feat. Lady Du, Tsiki XII, M.J., Nokwazi & F3 Dipapa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee5a3b93c303f3cad112dcc8915ab34764a735b86d21a53c647ec8669f12c6. 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/ZAA012200247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cb8c7762efee68059caa6a4056e9d5c4e64c60a4a2d136942f52ed7dd61e01. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/ZA61A1304488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee5a3b93c303f3cad112dcc8915ab34764a735b86d21a53c647ec8669f12c6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ZAA012200247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bce4f2d7ef4c710456435e0b32d86dd049d06d3b7264be4f29034f5885fa9f7. 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/ZA97K1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13fc8dd9d3bc811fdaf9e66983ed8e4041247558b41a912e4198640634e3f95. 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/ZAA641900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50274a15a9b535d274d466026b10fca4686393544583ed7a1db0990e9c1f2b21. 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/ZAA641900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb431b7cdb8a5730e4bc43331a91258a5292b745b67c9020bd081a5bd0aab41. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZA10C2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc260ecdda65d142c436a64941d6a8786b2769a61ed7838ad2225f2e6634c2c25. 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/ZA10C2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096c6e4f0df0b91d23d8d231e657a93eab1708dc8896bbd490a28063e2601596. 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/ZA10C2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19b7847d5331b897d5ef04977f201ad7996822d6bffdc3ea6b6eed3dd28676. 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/ZA10C2000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc8fee869fdcc49f30d0678b75ba6b9dfdb6bb562db959ecf61923c7b4c88f0. 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/ZA10C1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a86ddfdae40725cc4266b23f3428440fce328b1905cd0340174ba81ab7bfb11. 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/ZA10C1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3722f1f52dc1e8546b41863d41732ca3c3713e285888c0964f22b086dfc5f1. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ZA10C1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb431b7cdb8a5730e4bc43331a91258a5292b745b67c9020bd081a5bd0aab41. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZA10C2300001.