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 0xab0a5fc572bddbbad06d8579c081fc460ab8eb6ac2f79ce3d4711907b5a0b997. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b98cca3e-2cd2-40c5-be82-27d10872083e.json and https://artists.proofprofile.net/proofs/artist/b98cca3e-2cd2-40c5-be82-27d10872083e.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 0x51e5ca0c1d49c6fd5fccff2961b83ab801aa9e5777f79b105d5079e3346f319d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:07:33Z), 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/NL5UZ2503426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ff93fa20a8031e9d4f98647b6a7f295a4c17f67aa6997590cb46d205e0a26b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:24Z), 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/NL5UZ2503427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9975ab241cbfecf2c61c9412a2b7678bfcb20fc61b7586a1fbbfe445a22089. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL5UZ2505114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665841a74993e9d2bd0576e58ec82aed9889b8926c278141d564dff2ab046838. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NL5UZ2505116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3914b2ad14a4008637c5c0cfcaffe8e08b5e1014642837003b1c0521839a2f. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/NL5UZ2505118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1449bbc546ceda9636e11c0cfcc8f20f61c302bc46683853b9b8974994eff4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NL5UZ2505119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375f2a167a501a39ff922c3647a9ae7d849951256f0843a50e63959d8f056eb2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:53:03Z), 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/NL5UZ2505120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba439420adf39c1afab3279085f202c9814dd8d1e0b4e7c279f3f9fd3adf864a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NL5UZ2505121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e617b0e54572c21c17100c06a63dd61319865cfbeb08033f0f71721640f1c7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:03Z), 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/NL5UZ2505111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8e25868202e3f20a1eaddd2378bdea1cff276feb90ed778295a4fc7b85f96e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NL5UZ2505227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a80e1528f88cd69843b1ef80e2fdbd516010b82d1916fa77fb491b0cea208b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL5UZ2505228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282ea0715ac0daf1a5a81bab64b2e4a92043b3f77ecf6499d15c338897fe4fdd. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NL5UZ2505229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d46cb97d115b5d906dfbb57a3d60c8130d18fcc4bbed8c1728f47880ff578f3. 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/NL5UZ2505231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241cd58bb7ebf61513fcfa80d8dd3b2400aab1bb814d8b4bb166333e732cf16. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:17:40Z), 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/NL5UZ2505232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7de93c69110f726f66858cbd1f0bd0576d3c9f2c232ad33c67f52c96afd9b3b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL5UZ2508580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9f63fe11168cea015ebe6d4734c3de178b523ece05bf747fde7416fe406768. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/NL5UZ2508581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dacabad64d214a4f714b016cc7363b9ed78cc14a939c0b20e0f5cf55ab74d31. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL5UZ2508582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7de93c69110f726f66858cbd1f0bd0576d3c9f2c232ad33c67f52c96afd9b3b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL5UZ2508580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9f63fe11168cea015ebe6d4734c3de178b523ece05bf747fde7416fe406768. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:54:54Z), 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/NL5UZ2508581.