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 0x63878d01d529d5f81bfff558b91c5368b389d78ef7072c687699ce52db42d5b9. 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/7fd5acaf-5bf0-4fd4-ac6d-385168630c1e.json and https://artists.proofprofile.net/proofs/artist/7fd5acaf-5bf0-4fd4-ac6d-385168630c1e.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 0xa41625f4d29353cc0c4f8066aa06cf47a3cbe4e6f71408cf0a6625f6c1e431d2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEYOK1663938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2039b3f014a975f2d82f01350b95280630d5a4dd2b9c9e593b7f97dd74d7c58. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK1663940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d9e976e830ce1ac88e237bed17f81a69884fe4117f483f4e73ed3f434c83bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEYOK1663942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7ee561f505c59e44f1775f519d51deefbce003c0bd3a38fa68998b7058831a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEYOK1663944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f972661e18be42d6489ee80eadb0ed41f3b7c29060b4ce82b358bd3466b5e0f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SEYOK1663947.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac807a6439e5ff776aa7b0c7933f931b32bf64b9df479e2c7f55baf5e0b653d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEYOK1664042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd150cc233428d3a6dee8e261f3f6ee24df887ac34172718d7ab4367456b3f5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEYOK1664044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35da9b33b185b924afdfd37af1995f3b637e6f8aca7067653be3ee00471d3994. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK1664045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5857c160a2c035095d86e91fe63e0d739359f4a73046e1cc4b06a488bbe07f2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK1664046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064e9442e89acc8d2b5dcaa4d05b0da83241c775be3b6fc20a7a81d2ee717293. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEYOK1664047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6f3997f4c048e9e052ae97d6abc8344491a3867400e1c4631705c95110d678. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEYOK1664050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b09a4ba8f6e7041b6d25239af51696b126f59a68bf8a6c98138ac0720ea328. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SEYOK1664051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eb72d768232d19e5396f2559b608a768534adfa490c2ed528e5c7f3256d150. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEYOK1664052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dc19b60ffa5b6ad2d3c1f8cc18d236a15951b2549a13cf599850a9cc773a9e. 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/SEYOK1670045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f4b2417f8f67ae7efc6e79852bf9ddbda0a266c93d11d8db733bdff47fcdae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP1576716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce38b17a511d20628cc30e0b7475ee6c9e49ae0176f3e9825f6103b09ce63e5. 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/GBLFP1576717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1546e25a8d5ade2282c8960ffbd0cbbac4d38e515df7bdb6b8af957389a550. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP1576718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4f8c94c41a851e462769610a4c62b25c3d4433fe5ce7a00aed82f8f33b16c2. 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/GBLFP1576719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4fc6712efafb13a079c46aa5913d2ccab3d649efbecaa88f8051fa44859227. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLFP1576720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14ef01d212347761802cbfaf5f3cf8b799ae07a17968968dd0e16874a28e057. 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/GBLFP1576721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84da0bdd20211d434fd3ebf041d1c8e08767f9a588374aba589665a9ffe9a5c1. 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/GBLFP1576722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece18c64e69857488617fa4d9de0c18d723072764104fa1e591351599cd15e36. 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/GBLFP1576723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a228bee1d92f0d863645eb2f759e3b32fa858621e4d121ac6d096c6bff4587. 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/GBLFP1576724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7e24003def6b2ec0dc352ee33545029ba1a8e057f7ce37cdc0ae99ea927fa0. 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/GBLFP1576725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa624c5694dba33fddd604d607e97a750df336c64f3589425a784e44bb9e4c287. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP1576726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdca6a98556ae4fd43cbadaa932acd15e2e1a8b64bd41491e2a1f71facaf6a0. 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/GBLFP1576727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3958c9f599001cfafa28cdf254e7d7cdc2312717acb55d86838b8ed47f41b52. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLFP1576728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dd2b8d9b49f51280e6e79443681fb13a502b566db509c1880745afbc3f3c72. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLFP1576729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b878230aba170d5afb7b4152014e9dddb7bb70f126b73ecf1ea4b0d5fc864a3. 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/GBLFP1576730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ac4eb3def906c4f6c6d150f6ffa4d6b0cd5924565cefafabdf8efe5787609b. 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/GBLFP1576731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346d9ce8f27a1b02d372405307af84fa411f545efd4889d15342e5ae91e36fa0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLFP1576732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf0f0387de3bfc5a0bf2880fa90a56c4e7a8902694e428816cd4f73dba4b90f. 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/GBLFP1576733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abcbdefa0555a31c23878ca2dfd6c9a97782337602987398b11ed2d28ab951b. 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/GBLFP1576734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192a1d3adea1770e8bf34eeb5c6f8eb958205c0dbb58bac76326fdb42297838d. 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/GBLFP1576735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309060a2934e33b83e1b9e8e7c5db9521b1e95968d6904077656a156036234f8. 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/GBLFP1576736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba08fbffb75863e934b0629ef0c5e9aaa175e2f080722509af6cea8ed5f7362. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITTL52420311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975fb6ffa83f2369df0cfaa1e94dd21babf7a2889c58a8aac3ecdb565afad59f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITTL52420312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef6fa93b818abf42ecdbb6284d001efd2b42f52cb159283884e2ccb5975cca0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITTL52420310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d834dd4966bc23e735a572ce09b4364f92fa9181d3acf71b930d57e99f91d1a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ITTL52420313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80903f0b4f0bd343a80203714e423d906073c6742296ae9566c6d74d4260313. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2440736.