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 0x0bd29bc8bf742a45a1d773a4d10cb85cd1864f2a3c46601d7cf637a8fa18602e. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c62ae66a-a730-43c0-9c58-d8ca48592d76.json and https://artists.proofprofile.net/proofs/artist/c62ae66a-a730-43c0-9c58-d8ca48592d76.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 0x8f247aa9f0d3d82ae4d91304db70a32ec4a2e0981c3c776ac5e8aa07ed6b6276. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBRKQ2309758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3138bd800825053aa965a36ef91b46de8352821c8d90cff8fe5f1b8636212a62. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZWDE2433722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb65bff27496a90ff4b36b151988fa482209a92f26c374ab711df746105442d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBRKQ2454602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b3294ebad43bfe88dda87e279a435d153aa0574e8e9dd7a27ed23046df5487. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USCGH1730065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac099f656a9da2be4c743915a2bbd768a0ea40059b55f45713bf69c45fcb00ef. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USCGH1730070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af55883eca70e6a541a22103c2da28b7378bba5eddc4abe471e90374e90c0bd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGH1730071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057a58f77116d0c846277f078cd36bee83239f34ae20b9a7eb5b8ec514a9f259. 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/USCGH1730085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695b4afb40e56985394dfce73698a8c56cdad3d3382b78b64d111b29a38c2f6c. 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/TCACX1766543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5a2a633a22b4e0eb9feefa693fc647da49ea106e4924cf2ce1be3090d11f55. 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/TCACX1766539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c87ccb5a4ed3f4eec4b11b2debccbad822142ee60e89412b0f78f4273004f82. 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/TCACX1795876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd8db522da97b1c3949cdbeaa677474e52babe49a93f53ef1eef8663b9c91e8. 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/TCACX1766561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e279e6bf75fcaaa9559b96012366bfdc7e14b9a8f6b759378436669a46e6787. 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/TCACX1766574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe437ff7c07650008a3f5cb0de0ac086695fb435948b20f4c946699199b7713bd. 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/TCACX1766513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddd1b64b33d96786f6b79f59572451354959ca296c6e1e55e3bf444e7a30d33. 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/USCGJ1834065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3a61a304f5cd69847d6aadc1714f665bd9e8137d7861bfffca226677ccb81c. 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/TCACX1796021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08694fbcfb63ad7e12c089569d54daaa24238d9a369f52aa7b53e75efc6df025. 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/TCACX1766511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e7aec669baebe5fdf5c46e02f08f08941f168206e3d5f2e4f0c785ae224ab1. 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/TCACX1766579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55caa148dad871d276dff065071517e80df1a9e02d6063d6dcd2ea613a7c156a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCACX1766549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440609a157abe7f4f5882adf9ea2039dbe7560ff77ce91e205676015e431466e. 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/TCACX1766522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ac7386817c8fe55f2bba34579a89e8be8c2802b6ce2ee241eade2299acf91d. 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/TCACX1766533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc61d5a138fd13464684cdfb08923d719b36e42b1a564c1e4edb8c5c8a5d6ea. 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/TCACX1766568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4db2bae8eeb1aeb203e948fe324cc95dac56ddbfac68ce70af8b092261632d. 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/USCGJ1834066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3b01c2eb32644ce8a1e6f3ec1b56cf7092ca69808a6c13d9bf116ada74d51e. 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/QZFZ22408322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2d2d0c8d8204cf5283d06472b2452009b17911b4a2c739340a89da410624db. 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/USLZJ2374663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ca9c76aa456ceddc65256d38b2a5b3184612f76b613cfe3c4efa1dffd2296a. 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/QZWV32460026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d089ac88eda5ad762ee5d243792851da67fd66fd8cf3416c19c49087de33fc4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USLZJ2374667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9348057d2e8d5fb14af4b6f752e1e6f48aa2c5bd9bdda57cfca49975897c08c2. 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/USLZJ2374671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f280b6550373d04dd2a0256c4eb0bcafb24c083badf430f379c9e080259a2fa. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USLZJ2374677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2c58004442116d77de49e3ce86e665507e3114d2ba4fea27ec87e5604373bf. 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/USLZJ2374681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4092d3bb7c5eaa22fafbb7c6c80c45008c57fafb5fe2e0eda298e289effadf. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USLZJ2374684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ed0f85d68c3210beb5b7b3a9440075dff825644f74eed940f2d0db0fd5119b. 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/USLZJ2374687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4fc89cca45e34fe6d0c6e29b2590cd5ad0c3b0704bd7c9b76329aec8415b5c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USLZJ2374689.