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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9fc6238fe6ba7c2022a5dbac681082e75d7d0ab96a69f435bda9f1995e522f. 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/2de6aa95-3f84-4a23-951c-2fdfd672730d.json and https://artists.proofprofile.net/proofs/artist/2de6aa95-3f84-4a23-951c-2fdfd672730d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdf63d0bbe74772fc90af04589604b66a017fc035c4e55d118aa98727e34785. 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/USCGH1753073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a49a8131c8aa29a2e2a775bb2976e4974a0a777cb164bf55de5284cf73e750. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGH1753082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb53e8a6804f3dbe9cae90983f63e5ba0f0f6994f58b68a4065b2260b7e916c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:32:38Z), 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/USDY41973587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75aa6c85704c7120cc19c8b8c69f5121ea618594d509df09c5a12f84f6d6c1b8. 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/USDY41973588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb3a7391013840a319b574e6e67359c95dc4ecdd51cb4b2a8c07f3cea2a2e6b. 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/USDY41973590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc7cfca86be98e472a72790a40b9a5a55173fbc32c1bef0ea447860c43486ad. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USDY41973592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbc13db3e9f9b0ef3cf67b40b6f55b2b30e66de6203a4d631536e97f58ac825. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4R2245533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd7586ac1dd24737ad925df1456505666bf5d613845ed0766193c992e9a7c69. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USL4R2245534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487297ef543cc0b14f0647b8479f1c32c272c8560b0f4e80ca31f81dfc061b48. 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/USL4R2245535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1a6d3f2a97f7c55183ca74e0138303ed4b6c3e0eee2cfc4ad4e903322e2a9. 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/USL4R2245536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c01f6f701e5aab41e6f3412c48b1eef73a6b50a45558f15c4fa57749baa6f26. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USL4R2245538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660a0dea5da0c59439c3fbb202dd95eab61ccdac4bdd568cd7457f5fecd30408. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:01:14Z), 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/USL4R2245540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5e0512ef57467c8cac3600a93259114b2d65c266abb4b01b4b13475f7727f8. 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/USL4R2245541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4736ad62369be849bf80968683d59852d86320d352b349f19764a57e34560c06. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM22540712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c7a66ad8412d7fa730dda3160aead39af945ba58abe7a021f4faec52fe9866. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM22540713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29561a7a17e42be6cf0385a83dfedc1aed1a34ea167aa40b2bc74cbbd87df22. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM22540714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f08675ec4bc12e249717e1b30c1d85ea806706040de4536a6e0a0d68b36bc2a. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USHM22540715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5dec251c2ecf12e4eab49ccb5e69c66801b435b97816d294352522b661eabe. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:15:57Z), 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/USHM22540716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8334d81a3e32b9c585cbb59fd75b4a5682917ac93e1e1533197ea5dbd025f757. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:09Z), 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/USHM22540717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc9f5065513fa6414117c995a51b2191a0520ad8da2263d01fa1c9ba74a9597. 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/USHM22540718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5fa8dd296b4ce5225cfa331605501276e06fc2cd6a3ef562f33ec44dfcb9ef. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM22540720.