1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xe1adb3f1bf61fbfaea541fa64712d4966d1e6653ab53bbd4518c8f062349c5f0. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81018694-99af-46ee-9e24-73cab12c382e.json and https://artists.proofprofile.net/proofs/artist/81018694-99af-46ee-9e24-73cab12c382e.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 → block OTSBitcoinBlock must exist at that height 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 0xa8cfa29827cc02144ce794bcf80a09b431f1a65a654eb7a69af707c139431f51. 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/USLZJ1890560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8114720c339a545f7cde0f9b50a258eae55c9cff131ac83a71c9b5779c6b6be4. 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/USLZJ1868698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0d65e5ee1d345b59a67093b5a19b39fc18388644b71e3142b720b7d0140773. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ1868702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925b68ffd8ce39fcee9c6348585f7f7367f9e6064012adde3880de8bb8cf466a. 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/QZES62412902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe66a9ee3e7e2304d7bfa7a54d763bc23ef5036b20e8210da43a1102f7eedaf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ72163516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9d20559c0492ae6f1e21b8e2239d62a1c6b2de40c686566a0f2d7b54d5e019. 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/GBRKQ2231268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82e25cdda3c44b4a978eb371cef0a21387a19a35a3f5a236ca4f47defca748c. 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/USA2P2135865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b7a57e03279f3a77c382927879471f09b18962ab58648d1f388fb51099f263. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5FN2005297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41589487458879cf9ae87f13fc33278d806f73d96a668a0d90d878e3c387fca1. 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/QZ5FN2005289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b4193c2e241a396d9f1fbbb4318e95e1a92d8e5e879b8ee40515e311f374ed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5FN2217470.