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 0x959e5796d4cff64a681d7e257b1279011443a6386e25784e87637bd7617e6a47. 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/a3830d55-451a-4ac6-9654-1f9f02bff99e.json and https://artists.proofprofile.net/proofs/artist/a3830d55-451a-4ac6-9654-1f9f02bff99e.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 0x53b08711b2257ebf660cf7ed4342633924b8e3df5dbc0e4aa4bcb0c32bc0c8c4. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZFYK2200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488c537088e117b014a14177eb275d565f59611706d1d9cdb404b75c56b6872. 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/QZFYK2200555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3e5e959a00641749623338fa96bc948d134ed8386e4f3bd3f5017d678b21ac. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZFYK2200556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09d26819c2fe6304acaaa187ce1aa3e4e146ca214d9b35db0d35a65f70a398f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:32Z), 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/QZFYK2200554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99c073904b8b38f111e544a33c2fe129c8cb3f479c040cbcd714e4f437b3cb4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAGO2209487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f0cd9496178c135c7d1d66ef5aa30e7cf6caf087700159fec6d8806f4a3261. 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/US3U82400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3e957834499cca188a5884b63cd3cd4aa124e7421e9fa7cf94c13be5100ca0. 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/US3U82400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbc2b5a37cfb21db50945b8f3a892d113f5504088e68b804d01c704ba1ea03b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3U82400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a2a0f9fa28dac84e00683d697538af7847cda2541d56303eff6d25821c8446. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/US3U82400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7c7929a9f6e4c26c67eaa8ac07f7b8d82ea8707e378a4ccafebd7d0498331a. 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/US3U82400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f0cd9496178c135c7d1d66ef5aa30e7cf6caf087700159fec6d8806f4a3261. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:31Z), 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/US3U82400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9617c5b9acf07839296294ec071cf79257df56ebe7c3e3985ced8161ce3498. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:24:44Z), 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/US3U82300394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116d20159982614102ad37e3c2bab2673bc06bc20eac4e743f11761466773fbb. 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/US3U82400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72c8b78663145b07b2dc2e4e27d6591e9c0eeb8602db3751d899ec7df4b8667. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:42:23Z), 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/US3U82400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d17a53ec613b7bf38858d409a168a604bfd507359bb68182d147aee9ba02fb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3U82400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21daa1adcdb1465b7350065b7fcaca3672cbed39ec66de3560fd8be09eaa871. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3U82400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6274a8580c9eacfdf6e47d785c8103e5f78b04ba58181ea15e4af28b7bac581. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:54Z), 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/US3U82400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f35505e0f86d87e373380e3fed67dd74a284ea164f53fcfd4bd80adbb8013. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:55Z), 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/US3U82400403.