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 0xaa032455bfb6da896a3e2427c2dbd7b1c23561c82967b452d81c30219e3e89dd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87fe180c-8843-4eb8-b1c1-adcac097bc52.json and https://artists.proofprofile.net/proofs/artist/87fe180c-8843-4eb8-b1c1-adcac097bc52.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 0x31493b32b2fe5a71b17f8b9b7d35febdc53b6a51a43b895c5ab55624efad8ed9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZFYZ2335271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58138cf5c41b0c8112a7c001e1018df619a12116a2bfa9e887a491e1f4151f23. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6N2371254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cde05d6a28afab94cb310c95f1275c4018c542d3ce5d1838aba275f824893c. 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/QZK6N2374745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad43bc399fe405f48a315cbacec4bc87244cd5a54e207527c7aa6c90a61c5ee0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6F2378353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b3c6137ee43050a414bb19131c5ef68fe4bcaa04ce5236cdcd4d557b998fe. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6F2377530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fa6ca9629d662bcfb8910bbd5f9a5abf1ed8b79e81625de04745b36b972431. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2378355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8085272d16bfb10485af4caa30d10075c1e23acbbf01162e93ab9b4cd4792365. 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/QZK6L2402547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4f5e127d00812e8da28f30bb70e5b12568764e725b77d13c8c562cb7ed7ab5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBA2465147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a59b2ab8523d41aeecf0f2fa281f10b87aa7299fdd7b52bc89141881ee5f15. 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/QZTBA2472257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb7b556c568e2de7863671a1e4a7ed12889c39566ebb9a1510c2bc6b956d252. 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/QZK6N2369316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54d01c7135f32e67a62d80fddf6f7d2156101586c39338720f3ae95107a4b4d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFF2537508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf135099be171be24149a5b0b0724dd8284166883ac8bd592555d1dac3033fc67. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2539494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07edaae47c66cc455cf446e580e5817c79674c7949d6921472c38b83ec4a8c9a. 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/QZWFF2539499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619c90adf08a86b75c0c085e0fefe8c9c12f3d2d76e873bbf935db8166ccb565. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7S2521798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c51cb3e041c9e25d77e12f3fa58a8bdd36c5d4531f5ea1243c6138aa384efc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7S2521683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876f369a696474867e646e20a3e6ca5437cb884ed154b6b69cdde427bc153f32. 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/QZZ7S2521769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b17dc5c849dfa122b461821c003485e573f3b30e4530748eb8e76d66f8b797e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7S2521728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8b15eccad42321fffe332db6c379e3eae651435436cbd2791ae8d866bae79f. 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/QZZ7S2524244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf933594c5fdd9d28cba725130511ebbcad67b777bf287ee390a2ab652a7ed68. 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/QZZ7S2521736.