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 0x8a9efc55ba1c3a0218801c34bf328bacd508091244cc66be5356329eaca43eec. 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/40421f9a-bee3-4275-bbde-05c9bdf73239.json and https://artists.proofprofile.net/proofs/artist/40421f9a-bee3-4275-bbde-05c9bdf73239.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 0xbaf6c971362ef54a04553403921f96ff83aaeb71833e31dfd5d158986e886dd0. 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/QZW9L2387370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9617e66a6936948d88a43e2efbdb93c2675c67fe4ee354e2beb5236f6f7e91e. 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/QZPLS2028050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6123908cf1c0ffedc7b0dc036e35687c6aecedc6d9ffc72644e94f723dcb89. 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/QZPLS2028051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6921c9f67c57770614eabdad6f52190d2315aab32df62e678d91ba2a93b777. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPLS2028054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f42099eab7226a78fb6d98d9efaf62c6efd85994a418615f02c58cb77a2d710. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZTAS2164490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0887f5168ae0aacfe90d986ad555a1e79539966bebc7810c5da02a8df926666. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:00Z), 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/QZTAS2164491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdcbc10a404daa50c1158a4e2ba371fc71ae986a10a421dc54aedddca57e7ba. 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/QZTAS2164493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9973e734a2533aa1566069518ce9f322228aedee9c8c2d3757eaeb923585c4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNJZ2274308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ab32e27a954fa7d2dff796300267f80af4be608a1e8b2fb09487ca26754ed8. 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/US7VG2338473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebc5a7eb65d65f0ca810e5dd610778a1ecc7dc13d1798a058f50196cd7481e3. 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/FRPI32300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43356efca1bca37b22e743fdc0d09158cc76443f28766277c0ce741eb50a6dfb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJZ2324630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0635c365ade9e520da751f91bc099852dcbdc4107f4fe360c3ac1d65e9acb67. 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/QZTPX2413379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02044ec48230e6780b93a0355fe9a04ad5ed24fc28342eb9b51cdb7ea6e51912. 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/QZTVM2418808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5196f5882cd3f86c89580b34446ffacaee4710bb4139d20c6f9539720c2cedcf. 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/QZW9K2421420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160e9a50914d210161943c58fc82527aec5798b43df11788fb5d9c7b1ceee635. 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/QZW9K2421427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8615bc1797ae876c08ff96ccbc103a5044a46cffacee133116f9a6b27742d7c8. 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/QZW9K2421429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae721590b16a010255e6c23b8fbab9984a5d5695b6379be3aecb90d464ad63fa. 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/QZW9K2421430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cf09caa115b7b30a70aa1426884317ba5398af974957d894e41b5eefba0ed5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:53Z), 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/QZW9K2421431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c034af3b6a02f70872e59895eda54f6f7682890bd4e77d4ab7d2464d42865. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:16Z), 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/QZW9K2421432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe997d9255cc469ce9e9fc627c49d101d9651316273ed5be5335b282d298d57dc. 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/TCAJY2574969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbced4c1c83bc9b2f0c9243b118f152f8ee71035dede82fde45a2f49a8597411e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJZ2559227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abac8b2f761dfa3287d025d457d3eab3edd3cb88339b477c4a10ecbbb8d6a0d. 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/QT6632575045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ae585f9b87c3c6bd7593a9c3f5bdfe3a5227378722f09aa3de19c68e69043d. 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/QZTPX2326156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1e5252dd4324bd753ca88f902f166f77ebce6494d9e698637a6e934db036a2. 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/CIA3G2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d4cadc1cfa0a2d0a3ce633a70970d66b9152799ead32fe120a81e870b45a3a. 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/QZTPX2349805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9743f4d734c7228b7bdf1db604aa3e99ada2cfc9cd90ac83056b167cb5654e5. 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/CIA3G2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298ddb9c51fc1ea922201d0f42236fcebc336c661c561c0ed15cbf3aa6357dbb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CIA3G2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f9b38314363152ea1a1deefbcfd773ed8d488851c7e82d3d0ebdb1ea020cb0. 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/CIA3G2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbe5f32da3fa381c79b2adbcc73b0df3a8aa644ab69059a38aafed7322418cd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CIA3G2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a88c0391e1446e868d4a1f10573087b30c8f034e10ec016e8eaee7752878558. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:10:26Z), 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/QZTPX2306167.
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 0x4db7eb59aeea9a88b560fb05c76e777e7727a80e39b04d933dbd24dc5fe17554. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRX202189468.