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 0x7fdebd5f32c7e4e837ae33d3ba234e96fc022d0c1cdfb833ab47701f6e01c37b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b42ed470-50b3-4430-aa97-4b2a37526313.json and https://artists.proofprofile.net/proofs/artist/b42ed470-50b3-4430-aa97-4b2a37526313.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 0x2b402a4e16224ee3b3b8a9c1b791ce523ee9def0287a89f382376d059a071819. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NOKAR1503030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169f4e0adfb8aacf14f36751c081661c292d19972d35a4c69744a6645b575ea1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NOKAR1503010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36488c638e068aa7d650191928c753e1efc8b5e4832da3f315adac2281c35572. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NOKAR1503040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a7be00c826e4226543b8c7d5ccd35364e260554c33919a7a373ce83829e222. 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/NOKAR1503050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ba4ba07c3d227f9e9550526ccba183455a41345b53cd185e2bc2aa096ce22b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOKAR1503060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbfe81fa3dbe5a63ff4bbc041d2f678491eb1ab2a728b52f73c05f3902f9bf7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:18Z), 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/NOKAR1503070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356b59a438a9ce605ad16e6a4b9981e37027c2efa81524c38222cfc3881be162. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEA451900530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe444587ce33f79f44a92e8a17372e76af8ea183eeb0929b5789681cd8b445a30. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEA451900540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4b74c218d0ff5bafc3f24ac1a8cbb2d18df4a3cf48e37bdc3eb5fab0858669. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:44:01Z), 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/DEA451900550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dee1435b6a4a8cd49a8375fbcc28e98b6a875c8e4869cf1b846642847a7955. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DEA451900560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8532321eadf5bccfdc0fb339e514e8e7260b8f2a321213ec48e3045c0e0d438. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DEA452400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca63bfc017db77eadd7cdcb8cb34012c070b7c18ae841b652142695121294102. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEA452500920.