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 0x640fdcf16c7881c0e7bc215e674f9ee658b1d6b01b77b13356e112dc0340b224. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e3e3f61-aa2e-48ea-a90a-04e165ddad7a.json and https://artists.proofprofile.net/proofs/artist/6e3e3f61-aa2e-48ea-a90a-04e165ddad7a.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 0xfb1ac893a6dc5b5a940d8ef830d9ac5e8a5f42f8ee5c8357bb9825d6b4a73644. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:16:53Z), 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/QZTBE2351399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa478371d72d4d66e0676b3ff6c8f8793a391aa274d5c3d59b47440cfdc67fbd6. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:03:41Z), 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/QZTBE2351400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca0bb3e541e8bf34df4fc53383f0432327edbdb808b727911b5e9640ec69d66. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTBF2386717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6715f4c1b3f0a3e3b3f14853f707129959036e799a5e8448c544b3b5f4b87a22. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTBE2351402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2af324f74c63b46adc878ec495d17f8fc16ee8f954133a218c41436845211d3. 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/QZWFV2494936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480ba6f37ffde8d731d5cfe2cb1ead17ff6e8dacefe9935c014e9013d49594a5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFV2494937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f15bd512df0060b6f7262da7e589524cbb94e20578f0d86485ed663b3c9405. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFV2494939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f77706cda10b9e55b32d224ee3aa4beee59e2583e9bfdffb524f2568f19308. 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/QZWFV2494940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc641cc1f37e2ce54ebe0226c9c9e3b18aa727944c6698aad45a8ea086f950d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFV2494941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbf9480459d4014cb828755c55505d3653b0312e54754c823d40e497f8362b6. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:57:11Z), 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/QZWFV2494943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8796e8b40689d39b05e43eef676111298dbff7b9294a7a1eaf420daa8896456. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNC2581544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8de44a925e66da7bb06ec843606a90fb160248adaa0f4bce9dd2b751b58e8c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:38Z), 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/QZHNC2581545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9be223ac7696be542a52d35c4fd094cdd8c067a8ddb1d4d355d1b5e4c371d1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNC2581546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895862acd0a7fda6e9fdc313453f03f2e92136d34c1a4e67f59b581e82b98c11. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNC2581547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ecb9b9b49fd08db89117a54afa717748c874bc3f78305c694d33fc3cd5f7a8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNC2581550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b1f502784e10a8c1423cc846a13a5d8ccddc92f2679750217d5cc40438b847. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNC2581551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c4fc6436d06d0c2c6c74d31b4a64975e7cc155b8bfd7dd254dadecf29a552d. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZHNC2581552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe613d76a9a674f3d9eaeb265452bfa1d510bb2ec9ecba6a7756263f46ae41580. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3FE2525424.