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 0xf8b2adb565b21b1face6ca9fdf489105165d08e56cfa34b5fbdd97f92136bc59. 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/6e67cfb5-8c97-447f-a984-b064b0778cbc.json and https://artists.proofprofile.net/proofs/artist/6e67cfb5-8c97-447f-a984-b064b0778cbc.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 0x208489b6cce0fe352ac3a862da5c63f8fc68a48ff6c29639cba437c85a5c7278. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEAR42026926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598b39f949366694457326864d2733a91edebbce280b26a89592921db03bdfbb. 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/DEAR42027515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1da0954301208561390539f141703ca1178ebf633e6828348881718a18520f. 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/DEAR42097865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ec8aa07654e280791536a5d91f8c42b5ef3aab0a77a2c32b21412c9d5e5ea. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/DEAR42037856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd06294e143e4c20c7e0ca60196b24995e501d0b3385f78db317b8040c18ca4. 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/DEAR42044157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f9a9aaf4d983601ea8161f562dbecc68a916fb8093c15883549474790fb480. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEAR42052100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da3fb87586bba370d7cf6a0d4b1ce221982e51323da7be02827b9b9c6ce9ef1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEAR42093089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdd8e2476873e773ad4e7ab6d843c5df0caaa6787b0ec25cde232607b0f27f8. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DEAR42093908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3445003c1eb6dc04fb2401f3aa027443699722676eacc791610cabed6184d47b. 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/DEAR42015061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94591c23e0b836aa2a77b26148f9d2801ce31df6a54709a7612763510160a305. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DEAR42112417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd556460ad897d027da08c74c6d5b57d48d18b8246d253509750726e5e0f22e37. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEAR42112726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc352ea11a517ae8aa100c703059dc48cb120aa6d330f78082d9ab96824c7d2be. 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/DEAR42179088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342eb0523361ff7b2dc8a7fef48e5d2f615decb2c38793f841c021cd5ea6c7e7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEAR42153299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bc7e8c7443290db5c99409ea722f8fcde89baa84d8e000a63dcb5e1942ca77. 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/TCAHT2449093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390546aab9c3314a60b934712e2fadbba2de2e52815730acbd8acaba1d51f667. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAHT2449103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32621d3b4b0c1720620ac165747c973e876eee9842eb84ef820ee305c74589fe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHT2449115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd1c83c887343a6c5d9fb0ce27664b276f9d7b18c2c7492b7dfdf90c9df8a51. 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/TCAIZ2477244.