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 0xf5799c26506f39cfd631ae9c8c3a5664c53a863b656f06c7ff3895da61336b2e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ed42b3a-7ce9-4261-9a9f-fcf365365ed5.json and https://artists.proofprofile.net/proofs/artist/4ed42b3a-7ce9-4261-9a9f-fcf365365ed5.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 0xd61a895133edd23ea6d5f3f6e7a6ead56408a2c4b92c3fc2841253444ab1994c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTAT2538448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493e4bf4517dce0fed4e366943188507e9361184a77fb2a796120ead7d30b711. 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/QZTAT2538452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41688a663cf4c77f2d99dc988ed5813ad030ae08ac26c5477925b8794cf6d9be. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTAT2538435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4c1794ab5dc9209da3fd81daa7993bb45e542045c53cf343aa544129696e10. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAT2538436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0901f81dfd4efb634a012839827535fad9aaa4f5f1e51d6b1d8bd557c0d2bb52. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:01:51Z), 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/QZTAT2538437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9955003af096c470c1d9e5b5a1aa4496140b2244450ce12030b8c2d6856ba8. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZTAW2507460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58031e16697d6c35acaafb6a5dbd135f06ed43d8fac6822dc08f24f42ac2f8e3. 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/QZTAW2507461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482745a6b85fb55d68b5d26c104771bca275255a4d7bb7608f85225ed8a859d5. 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/QZTAW2507462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2354984dff753ca2b1e3814ba128bacbbc6a1f340034aefb9826b696b874f414. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:27:26Z), 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/QZTAW2507463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18d1a84e9e8d37320d7756d0fc5117abfa41f874f7aba65e2e05acca0a8bf11. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAW2507464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642e7ac63a116cba0f0c29528c1b40dd5435767d6250baa9204aa6a1c2999637. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTAW2546016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e41594934438e0b241d0c142647ee9bf5ace4ac9da6c0201b62985feeeeb1c4. 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/QZTAW2543387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4d9e89faa6df77392990f335c138553b3c27e2e3c1c29bb83cb844f0349048. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:41:17Z), 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/QZTAW2546018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc8b18d213cfd6083447a76153848d49aa2caf3c8afc5abb1ce17abf699215e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:45:36Z), 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/QZTAW2546015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a3bdcfb96f5c54c2764e4628d8f34d52e542aef630608342f768c3a0276103. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:21Z), 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/QZTAW2546014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72a5283179b5f075e9b04cbc78ed9f4da149f354fe240b1f65d09c5b9264582. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:10Z), 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/QZTB72504189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2251f6c35df5768fad55f87180ab163ac57a2b764e6aa7ce4572d947d82f9c0c. 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/QZTB72504190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5082a53551c5265c67895f54e6d6443d1511e5c70257eebfec6427cb036500. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB72504191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea67d206a062c1dbbcdab8e6dd6b706cb98da1082201a1bc2c85d97cd6196cae. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:19Z), 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/QZTB72504192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f7812a7907789269be45fcb223deb613ddc9faee90edc65f17dda07670fb9. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZTB72504193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba8ee903afba7fb3a646684c10913e31a009495184375b12703c83dd0279323. 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/QZTB72504194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd063664c9f1dc3022e03c5a875c522dee8115504e08b58122704e265dc4464. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:38Z), 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/QZTB72504195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d13c1ef4cd0aeb74ff30cabb248547db41451ceb7e5a15a44569ccb9992bb0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:30Z), 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/QZTB72504196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc60342dd91fd197adcaff4b6ecfd651fba22abf96798f30a0cd28245f01992. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:21:34Z), 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/QZTB72504197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389a3cbc4193d227c4bad6fb554ad9d45ea2d51e42c473e56b6ba36e7b8e2fd6. 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/QZTB72504198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e95d51a29fd02d840a86de68b55f0e9bdd79ece10cd4395ad01fb5430ba2935. 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/QZTB82555925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60a047773a8bbffe1fdc001c0d2dfbfce0677aa15e94c08c88fec6ed99d3a1f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB82555927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b913244c6154235e51f9a1081c306f1f36251ced837e799ad4da70ae8a3425. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZTB82555928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd418d75cd275f618193310346ab6470190f28ee983a5a730ec652b69a42959ba. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB82555929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e79c09e0fde28e1c9d2dcbc266c0cdbed4e1174afcd647d47c1b75b5386995. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZTB82555930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3591fdec21c5ab13f25d5208f3c996976622bb5a4b588c02fbe20e2d91ac3b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB82555931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d26bbaca3d4c7c6b38b1e796e70bd7fe1aaf3be729b70e8cf55cc45b2121ab. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB82555932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7fe40790ff8417069ee4800ac8df7c1cd64afb5db9ddd78a90fc4aedf9d186. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZTB82555933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5435d2bd045eac99388ca18596a5b27652c95da72c55f98e851a1a6c777010a0. 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/QZTB82555934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74dde4b79ffabbe6d849e47f0fbc30ff8f39f8429f574e28f54e832d297bc4a. 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/QZTB82555935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cd79414ee7d36fb770d90e14e4eee742517929aa327ed592045078c2bf5e80. 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/QZTB82555936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e5d1cd341810a6c0b0cdd7ce1063574afe4b0b46c947a363fa0fc7b48e485c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTB82555937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec1c61d7b1c39ca1e5e0ad58a3eafa0b9e426b175789b09c8d2085b0ea5c145. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB82555938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0c4229c4d3f96e01627097a514db7e60b5e843dddb26eda4cfaff10edd4c17. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB82555939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc06a61857f61d602718f80670c42a3a44801a73ee67fb0ddc0eff571a3f0ca. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTBF2505110.