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 0x2afb1904fc8bc90243c1325409824d915b440a03f4a2ba7ca96f7c7418b6e714. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/115f7b67-720d-4d1e-a1be-8770469caf78.json and https://artists.proofprofile.net/proofs/artist/115f7b67-720d-4d1e-a1be-8770469caf78.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 0xa11683626a0aca83333b9d79e789febd0b7275e44e480d553a33bd161d36a500. 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/FXQ102300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a787f28724d71811844a43cfade494d86c14f46a1ca045c39615ef51d9fd10. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FXQ102300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70147cc5f333b5981c7b372c2898c4829e8e852d6608efb7c189384625a0ddb4. 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/FXQ102300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a9a2149dc79ce832f4a34b2ad1c089196d76eb14e12427a19129ba934840c4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FXQ102300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180e39d63e2f0ba1bf13001e37043cabb7885c3f20ff8ddceb4a1bd707af7881. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FXQ102300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0535c5c685441f0d6bc766ee1ba21f1eabc55c135f41fea91ae8a3c146c73d63. 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/FXQ102300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38b0b2688c94b26c87f4dd85d5d28883f9c4befa74f9c21cd0aab574d4bd589. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FXQ102300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e39adffae3fde14dbb1ec2d5e9b08231896c77e27d488d268807d972fdc908c. 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/FXQ102300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38b0b2688c94b26c87f4dd85d5d28883f9c4befa74f9c21cd0aab574d4bd589. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FXQ102300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70147cc5f333b5981c7b372c2898c4829e8e852d6608efb7c189384625a0ddb4. 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/FXQ102300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58ca817feeba4b3af3bb9a866e9ae3c1a8bd0f52b11b6088b160bd50ee96f74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRDKW2106794.