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 0xba12767d1a7b996dba623dcdc06cdd4979651149ebcabf325f2b574724a2c882. 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/7e284be5-5d7a-4745-a9df-d9298972f56e.json and https://artists.proofprofile.net/proofs/artist/7e284be5-5d7a-4745-a9df-d9298972f56e.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 0x1112e58255fb1d4636ea0fb184621934daa93615e36bd4d625570d3ad40fce3a. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZ5AB1929015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37952f7e8f517711a05678dc761651c96c97bdbd94f919715f577392fa4545b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZGLM1980537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af2258e1f9e89fc0f931411bd61b07f1e05f1b078d4c5f06dc02d113f6775d2. 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/QM4TW2304389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a3a17151172ae1473a2066127ecbcb10d5921af353780ef99838528e1cf49c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM4TW2344748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46699c4781c302de75ae4b2981bb4f4e316bf219d28ae8909aee120585119765. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:39:59Z), 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/QM4TW2438248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2391dafe5db52dbfb91c0c2690dfdb6b94fe996637bded39713b1bf5dd2700eb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QM4TW2445605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2a29f80666ec080a60a4563031b90a56d7dfb2900ebc17bd374357b34846e. 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/QZPLS2472288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0353576a2198381a1f5d7743eea8ece87658fb17e96735134dde1285995bb74f. 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/QM4TX2589857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46699c4781c302de75ae4b2981bb4f4e316bf219d28ae8909aee120585119765. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QM4TW2438248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2391dafe5db52dbfb91c0c2690dfdb6b94fe996637bded39713b1bf5dd2700eb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:48:07Z), 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/QM4TW2445605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3537e75cbecf9833204051db6d8d7addce1d7a9cde8c14083b45441722ee29. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZK6N2448464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2a29f80666ec080a60a4563031b90a56d7dfb2900ebc17bd374357b34846e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLS2472288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0353576a2198381a1f5d7743eea8ece87658fb17e96735134dde1285995bb74f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TX2589857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadab602ae6ae8e4c0ea45c9fc930983bf2ada53fa4050600ff4121b13b0bcdc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6P42561276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bc3790ee5e946b1a2b0a289efbfae40bdb4d2f4d16f783fe5aeaef5fc4c93c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFMF2541897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9269b52dafff8ac0996b84dfd33e9b26a2eda050eeb5eb5fd601d3a3e0e4f21f. 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/MXA231500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161991a4ea51e880a7a35fb2c18d3044abb1aafd3bde268d33154b65cf28c4d7. 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/QZ5AB1783487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97a4fa9cb52fbe6158518a58893cb829a90f316b5472f92cb31ff97e315271e. 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/MXUM71800780.