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 0xfb369870e8426f98abe304e0acea36ff52122772566f5943780bf9e854b68be4. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60b83f48-7de8-4292-b6cd-05989a7aeeb9.json and https://artists.proofprofile.net/proofs/artist/60b83f48-7de8-4292-b6cd-05989a7aeeb9.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 0x489fc902182dc92f208288cdf76c73feb4f3218a7718f891fc577cba7c75e624. 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/USA2P2205293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e86a02f420cc6f4c7e1c60aa041995fd079c0cc7d5cf3acfc5aee3131f6a14. 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/AUMEV2429123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9d102ed2267c28139243814d6bc243a4268626521851d2db2763fb7af9caf0. 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/AUGBT2321247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0b056179dcb5e80e7e265862dd87a1b3043186c2e81b462af56906e95448a. 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/AUGBT2321251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919e60a66af759c2920ecb72b235c8c840508e7b6a596c196fa0f58d693e5238. 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/USA2P2106928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cfb494222bcd0af052584f31c15b22f94d9733cf98dc206fab3c43223e2036. 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/USA2P2228064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411c2cce8deefbfedbdbac74a50ed8b4591479c8a5b559825cd478d998934417. 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/USA2P2228059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41fd528e16b86194122bc1e3993c4c5b5c99587786aa712732ad7daa55453f2. 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/AUMEV2462618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381637dc0136bf206b6aacc06abaf44a1bccb99db7fbe1f185c1c28603aa6f17. 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/AUMEV2372809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcfd694c024067afe00f1b75692a4eb0128f1274abf9921e9ce2ca9f343c552. 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/AUGBT2211215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2695058f74a4c0c19aa53d14fb3267a297c4cc14f69a949037edb4f1444de. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA2P2231763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a50e0a661cf66728fd9aa93240ad5a3f5db914a5fa76000de093402370f050. 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/USA2P2224679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9220d7c60c4a9fc02a01ffa4a9576afa04c224879f24c8b45b1aa7e6303aadfc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:48:56Z), 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/USA2P2224680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0e8af11dbf9d264a480374f5f1ffd0ffc29cad211af92b30790e5a505f575c. 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/USA2P2224681.