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 0x98b8fcccf47ea3348ee7e37881df8dcda63c3f53ba1c8730b6ed4579ae9c3d28. 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/5f6d394f-c8a5-4409-8e51-fca19757e959.json and https://artists.proofprofile.net/proofs/artist/5f6d394f-c8a5-4409-8e51-fca19757e959.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 0xd265c6edf39f2d9e2af2500d8cef99d42a4feac9f1667868898a71b9da67720e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM21837876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9410ccc8ba5778dbae32d254ad9eb40279ec9681277baed56e239cbeb0bed04. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:26:56Z), 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/USHM21837879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a23030ec8b7bb8f4dbb4f3cad278099b79f57dc02c499d3fc61b77c568245cc. 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/USHM21837880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad23db03bddaf1d6882a0ddd0dce70ded725c953bb5d1519019488aa4e28ec9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USHM21837884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57ca982005336cecc733a3a5c3aab5ff3b1ddd3a2237220a7cde9cd233f7a42. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USHM21837888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2af29704a8b1277c0d39577dc97ad251f1b43c20952ca3ea762a5ca85b6a3e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM21837894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9584ff53f56b941ff5b8963cedeef2ddd7e351c7d93fc5d97e2ae4bbd206590d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM21837895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424883433ea16e2421a555b8256b522cc7d3b3bd6b2be3e30a1cb57481f4e65b. 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/USHM21837898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4036d8bc10d9934cceba0b8e85737bb5353db83d3a4f7e58a0f0e1b452f5f6de. 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/USL4Q1730368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38203a5010a472c4d21cac6604f747032c80460a9e0266c977f30893ebc5082b. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/USL4Q1730370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57047276a986042be99814e8e032edc63c16d16c5b0979b004a01dcec55d3ef1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USL4Q1730371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa707589cd816c830f41c8a3a8d6a84be6989326048ef95467c5c16d39740051e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q1730373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b6f3cd77c96ffec95505f3888929b43ba6535dd9a2fd0ab493f1ce5dfc2269. 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/USL4Q1730375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeefc9d94d2c599fb14e1f85d6ac087eb080ef26d016f7aea802bd7bd237430b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:38Z), 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/MX2832021906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9fe008bdd191ec99d9abb323485385fc9b0b09aa19673a8e27dec9df7f7fe0. 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/MX2832023866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce585d7e45d8b489dfd9f6e6da487b060defe6f75481d6a8ae2eeaabf7ffec92. 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/QZFZ62402495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf8482fa1c40dfe0cb5715eeac4bf62e0a5bf3ddbfb80a222b9bfc8c9c0fc07. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZFZ62402496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6936563f984f621ac1fc1e997ae693f7f08c47b4ffb43ba91c3d41c2f0847bf4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZFZ62402497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6368d597656ddbd14ac64eba4785b61e961471760faf0c12c60c7d9d98e527b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ62402499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8599d263d011a35fcd6a91143cccb7459c3b98b47d63d5aacb2c820432d5cf6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ62402500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a05f6c581e3180c27553bfa5268f9baf0a1f83af92850634869d55034caa09. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFZ62402501.