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 0xd17547c0e958b8bf8e17074ade61da4685f1dfe2bcd1dd6877bf85406d7be1b1. 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/93a005c1-3577-4f37-8059-4da0f1d75624.json and https://artists.proofprofile.net/proofs/artist/93a005c1-3577-4f37-8059-4da0f1d75624.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 0xa941a3043b8d93ae0643df2fcb3c6fb801efaca3372c4bf9e77101d4abf82332. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLR2258833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cee8dd0c750675f86ea7146e8fadbe6d4fa740f1018910f0e9623e9d4db68b. 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/QZTAS2291432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24412a9f3f8487061e85fea0af6cf7a1d17bed11cd25485f050ec419d790e253. 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/QZTB72225617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ed08a9f48e9238aa812c8c9676175fd781cf0b8d7d9938b1d1d96007d43ed7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES62371556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b3f6c3cac2532d588f1ad45d97d4c8d085e71eff45b2d574ab024348d41dff. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:05:38Z), 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/QZTB42301872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a06e6929ba95954865810a3fef0b1a0158d2a9d7d4c190c9cb96e80a3b4d7e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZWFN2326309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26805ea2434745b35bd5d0fc57dcd7ae25ee70d6fd2c44f5d428da1c0f2570fb. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:06Z), 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/QZWFP2301593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16ea03795fa101eee074063dd81259add561a91cdd616f9d46c58178f3eba75. 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/QZWFP2367353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6a9b0dc24ebbd0137da421596e3a4c5164b98c4fbc770a2f0228e2ca655ced. 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/QZWFR2325504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e71daf9d142f378cd81b5accf1f0a2f92e363bca59719c44ffa0c66a5e55b5. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:07:06Z), 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/QZFZ32400799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f8f7feac2505be108bc1c6182ca806368c980f780d286beb9e1e76d1212b36. 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/QZES72437595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55f6fe17d7e1ba9114503b0f406ad74e32136f23eaea60ede454a7a764e361a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN32464026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefea3db0a9e6ab76ef416586147c819a0ec498aca8567cedb51f52108daa9a4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USLD91758764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ff6848515141e75e4158ad5511016b97d3cac0b94fac0dee2311a4e648dde9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:40Z), 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/USLD91759594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81681c81392b2ff9e5a815eacd695a67fb1dc7d4c33f55d6559a394e94e1f4b. 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/USLD91759595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2657cecf9454cb464561bbcc4ef7573430996d4ca799efc8b67c680bc427b73. 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/USLD91760147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a68e0a06cf1da0e3840c3941b1cfd28f3e9287501812dc6009cceb6de58796. 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/USLD91760743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5183529e44bc426682273e126984f58535cab34eebfd50f2720f1a364b0a6b52. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USLD91760995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d113ee7b0d942d26d3bef09171f6cc7b3825526e0e9c1962a29131380608e5. 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/USLD91761369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a95eaedaaed3023636f7081dc70a9f07dd3ccca8893b7a2848214ad8972721f. 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/USLD91761370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703eef7e1d0dd7b6061d53e7e2a8b476bbd4df6277cf50e3f2740ce07cf18a0c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USLD91761869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd548959e400a7630de25e633c7619f9ef825c8ba8f0d9e76c71dc86f3b077756. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:51:27Z), 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/USLD91762292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8f73160250feac76b53c52828ff95433a47579bfc42bc669de3ac14db11e8f. 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/USLD91762294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e0555bb37f6e56ebddf756e5f92fd43f2fcb60a1f748c4fc971bd0821b6bfc. 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/USLD91762296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faab33edbeb970e66517a3dd58e2238bb2fe5fd50fb3813d3167cd04e4e0624. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:12Z), 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/USLD91762297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e7753f851fcb48301cb9b09d619770048dc57a012f739f1bced275a0ef874d. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/USLD91762299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f76b2edafe335b029a73bc20a33c42d99e784679da183fb2b3917af85349f6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USLD91763475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f9ad82e0bd1031a401d62670126587b37570f8c54e082396fec735c747c6a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLD91763476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd701be32dfa3aa75cee207b18bd7411f72dcebde67f0c0fee1f6a0cd51d3edee. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USLD91763945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41b753fc8c705aa858b0f94ad3708fc508ef8bd0994e7323ad59fe73e1c7d83. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USLD91763946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f5028b0cb8d687e6f168b24bb8c5f27bd5e2ab95e74937652720d2b9a89186. 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/USLD91763947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69409c51aa6feb4ceda21113f9bb3342fc7f89b2ec1ece417b60485c7ba12212. 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/USLD91769668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c638f84adf9d1d3b03823b26e8ba28aa397f5176ddceaa41a3de2cd20ebf7a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES52550284.