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 0x88f9273a4de0061441c4a0ba6ec5189ea2ddd804873f9297adb4e21599d9cf2a. 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/2b193a70-54ce-41ad-9a0e-b040b5d8c343.json and https://artists.proofprofile.net/proofs/artist/2b193a70-54ce-41ad-9a0e-b040b5d8c343.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 0x5f46e4cb5af189408ef8f80887d4b5dd086cb18f18c35272e88fc171d8d64352. 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/QZWFK2308515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b52999a01e00de64b9261d41b2cec328a7de1e2307cfe1edf4bc1e5e26e45c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBA2449084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9733632d0fc499364d365466da52f912fbd8313561680f343f8f10a98329c5bb. 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/QZTBA2449087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f46e4cb5af189408ef8f80887d4b5dd086cb18f18c35272e88fc171d8d64352. 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/QZWFK2308515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8ed655ccc368a6cfc46627e2c927501964a6d7949b4b3f00645ec9625b05e5. 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/QZTBA2449081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa895aa95531dd22be0d8b407fc412f4269680116f07df87e50e2c59171d1c8. 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/QZTBA2449082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7dd92bacc5c343afe89e641efb2483eb4c946625fc9eaa27449e4b0fbd977b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTBA2449083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b52999a01e00de64b9261d41b2cec328a7de1e2307cfe1edf4bc1e5e26e45c. 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/QZTBA2449084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6fc479057c880e4c59af54a9b631e260b73c469964a838397034d5c41454c0. 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/QZTBA2449085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2b067baa6161e9dfdc2a4ab6c5e9e07818c47270ba4cfc72a34afe3e3cfef0. 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/QZTBA2449086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9733632d0fc499364d365466da52f912fbd8313561680f343f8f10a98329c5bb. 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/QZTBA2449087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141a307324a6d5e02147507ba935e778aa4a540c3285cc06f255ee3e856ebb7c. 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/QZTBA2449088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed963fa547f7d26b024955f3f63a072b911f787537e7408a663e0f5459770dde. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USUYG1599207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2eaab86e29a66a1d8136e38b688ac8f69d75892ac7df75e1338efaa4c5fbb5. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USUYG1706885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000fc4d7ef26922aac3894b2b20d0f62a1f02072b90b8674f49db23cf05b7dd4. 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/USUYG1732734.