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 0xe6f45cc8bbab9fa52fd2f1729459a7a8d90dd50fc21d6fd7aa3a227c58794bb6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1bb0672-3b21-4d35-80f4-1ac029580f7a.json and https://artists.proofprofile.net/proofs/artist/d1bb0672-3b21-4d35-80f4-1ac029580f7a.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 0xe4d30479551bae2a39c95de790225c34842f6f99c8bc9af796499c5b21c62275. 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/QZDA52244163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eafa019a508e2e5759e686a4c885d57ceafaf26733a152e62e1fd149998b22. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:08:53Z), 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/QZNWV2204825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26371fd017942ac5b720b42782bb241056391e11466d9701cf0d4fd5417b31f9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZFYZ2365795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ab5a6e060ce99fdab7373aadee0941cb964c726fa0b9a11d9f3cb643a6266. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZES92340596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4669fa033e554910cd37d0d1999840b342c2b91a4ecf0aef807bb75574d311f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES92340598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fda01150646985a32a7f93383c3177f0d197d7c162ecf6609417637487048ea. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEM2343494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f926b95e4fdf9bc7434e2c27018552395fb6d42cc1bc0056180822ee8efb269. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:41:50Z), 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/QZNWU2317950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd856bc2fd8353e6272a11a7e6af17bc2c293aeed69c26aac503ea5a733d723d7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZFYX2491909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc194eb2148a81c10c3e101d1e22da03dfde2e36b69bf51f8c8832614f313c1f7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:44Z), 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/QZHN32491822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b8673eaf5202fb4c226b042d1dfe90e3f7753b5d4ffde7f36803c1507b8ce7. 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/QZWFT2440709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6df7e604666eb6b7b431167b9dd0dbedde9ab25fd370b43cb297ae8f16b8f5. 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/QZWFT2440710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95977b36e8b8d04468fa185ed2e9011f817758d1f4b67239652bacc1ad6738c2. 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/QZWFT2440712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e7e56f9a4511f30b931d7e15760dcdd9cfb048951479aaa42904db990ae6f0. 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/QZWFT2440713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed5c6fff65e08b00455710860e05d52d745754858ae024d2f66843209739229. 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/QZWFT2440714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61c61a5173c8814652a007a3cb4c1034b705d3681540749255f83e56566651b. 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/QZWFT2440715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a383e91a68a4377978e43a69c28dc2d90466c2cd68249e08d9a6a6e05b79ee. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFT2440716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4406411c4ba873ef7d80ee4339e6cd344800cd1f06e862f4ca3c5c4eb87281d6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFT2440717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3e2052ae00b03327050648a6adbd589eae5b1e90d5b10657584e6ee05985ba. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:10:17Z), 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/QZWFT2440718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb365ab2144b9ec720e2a62c3dab6494d925a0999f677c19e8ea760beb2091794. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFL2562977.