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 0x8d2af0c152a6bc6e98df6f05ef5cacb90bde6d7749c6d83c768299e682013f92. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64b1b9ac-b001-4842-8e98-c1cf9970ed37.json and https://artists.proofprofile.net/proofs/artist/64b1b9ac-b001-4842-8e98-c1cf9970ed37.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 0x09b0e8ba0fd145025213e9cc435fb8a41d8427a1e94c02f5d99b628fc4c7fcbb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFZ41964673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1989a8bfccae6679ce62f59ca8fdc92f98761b2088ce0afc6fd197d9a46bce4d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:11Z), 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/QZFZ42134086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84539c972466880c9e80853fe0bf67c77d84d20ecc2274b75b0fc00f75ab709. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZWFG2329888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1061052b53ab2ed46262d38ee7363b53d1ec5e6ef8c15312bbbcf0f1ad79020d. 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/QZFZ32408815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48ab267d0591a8d1edb2f153a3b9d7c5ed45888f5b2a2b8f4c3b9806a7d59db. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/SE5BU2430035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d0c91dbd28a19f54ccf71152a60f8f5b146325b85ea981f193016c49008ea2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE5BU2498564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375264bfa41b35ca02689c86e2cf9aba86c780fc544d9c0ea14033923ea031db. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZNWV2442115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1f79655692bdb6646b12f192765ff67a0b12434bb2b0e7f84bfb9948cb6aed. 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/QZTB92446170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35263979934bb668c3b28f96d46b4382694ed88527b26a8034ec25f3cc6acf83. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFK2480252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369b504a43edda9e7405cd713b164067a9806a67beff9ee3d11b178a75735c96. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7T2457470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee956aaef7bcd03d726e967c5146ee9631233502a6a2f28fe1ee5b82c7a5c3f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:01Z), 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/QZTBB2554920.