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 0x703220ad41160fb91a5491310d06b42b31d8af8dfa624faa6681c772e214eb34. 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/6c4a8057-3fd6-4cda-81ad-4b1601f8e432.json and https://artists.proofprofile.net/proofs/artist/6c4a8057-3fd6-4cda-81ad-4b1601f8e432.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 0x1ae61f3b93d67d9727a7ce2f83ecde25c51b91c90093e3959b9dfcd0cfb3d01e. 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/ZBCD02400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0bb8c9a6134323463c4fb161967f5291d2db18d0dcc5e22a5c28f424445895. 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/ZBCD02400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef848fadcd1f9608b0f456c5701d0e3aafde3353023d878c2447e0c56a515370. 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/ZBCD02400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71302cded4ba1be7242cf41d28a18234e6eccf87c342db6f2781cd98ca1f855. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ZBCD02400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebb963db16aabf89b2170387237b1aeeb8c37b0d769d11af9941bfedec2e4e1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ZBCD02400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955a5dd778bfa2f5799746f819d78fa68509d69cbdf01352837163df05dbd741. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/ZBCD02400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d58096d49dbb70fe2e3a96e434087dad9018116bbf70f563ced57049c6e92e. 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/ZBCD02400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9763507efe3695d9deace67dacfaa74a63a83ffb0b99a95f111b167aafb5e5e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZBCD02400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca7f5325d9ae7d81c27394ef4de4f68a78917c6f07e0a6f5b6a7fbf8720bf81. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ZBCD02400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ddbb3a2a60d332d54bdaeeb9d3d8707c1b8ddb9c72799295531a0e9767ff61. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ZBCD02400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a3ad28e88cb4dce2751bc18f5dfaea9a4ae35f65c3f46ec4f618086b8b12bd. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ZBCD02400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc871147ebd1ae39fb8a059b7244efc6ddae8f2dd2656bea309729a342509bd3e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/ZBCD02400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59be92ade6eb226c6b1b984f0ec33526a96aafd9c01681681ae49d0c09863b1a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ZBCD02400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2d8cd1fed421b21dc2ae74e092c00726b36d9557fd9331bfb8ebbb323aedd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ZBCD02400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bdc7890383ff94b038960b69c265a07846f48da5dd71de9ab100419c570ba5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZ9452005218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68af13a4cd1def2428f86a071cac95da2531f5db4c35344b3d4dd9b90817bd3d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZ9452005223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf06c3dcbb473f5acccc3497fd561f29800ebfccf3a9b121bedd393244763744. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZBCD02400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5c13402266bed288e57881328bc7f94097043e70ab056de655e9eeb002db4f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZBCD02400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37a09e8ad65b2b28dad49531d8852449ae3746517e7dfd3985d0f82d6c339ee. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZBCD02400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6630e241945ace1f452808e4316f44631d6e0b71b709eb147b1dc84b21f9e1cb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZBCD02400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02641e93b4e51c9f6e49f0c0872c9c1de977f1a8c2fa0a5af8a967b09e08f422. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ZBCD02400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4743ea8d042d0a5992c572c4f17d7aaf5a3407dea55f1c83534c171608303543. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ZBCD02400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4987634f7024ee6732a086b5e8d6de927a16e8511909b13e61971fbfba894415. 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/ZBCD02400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b430997c54a4a2331dcf401adcb62c288063b56cdb3db77b96a789d34f02e5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ZBCD02400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa37d8c89a23d175a2e19923f0b00466eb89c3e0ebc4317b905f9da85f885fe. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/ZBCD02400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237c65159a94e26e320b60bd5bc42a410c7749069f107c9cb4a14cec73bdef8e. 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/QZTRX2346938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966f12001fcedcf8c4cea5c532d46c922a17023ea1c06b9681d01c656f9d960c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USA2P2344618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b98841fe610a75f567bcbde3571a9b2dcfeb9d82dec50cc014374359c1eed3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZAAKN2200024.
Inhliziyo yomuntu (feat. Siya Shezi, Kozzi, Dr Thulz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0b4ebef43ef68cd5bef18fa2a26d1f200028207a9f7faf92e0a297ef7cd09a. 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/ZA56E2304032.
Uzongikhumbula (feat. Jadenfunky, !Sooks, Siya Shezi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7da2310a794262ecf30d01886378ca68071f468e4fe35ca6b0e4e1ae9a0941. 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/ZA56E2304036.