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 0x679416d7bdd5a8cc35203e526e9a7bfcbc70f24d0c44c87986dadc19f496008d. 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/b80bc853-7f23-4503-9fd4-bacc3656dbf1.json and https://artists.proofprofile.net/proofs/artist/b80bc853-7f23-4503-9fd4-bacc3656dbf1.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 0x1852e82fa8027c4ce396a06d94d9b41e18131b5a93616d82c82f2ad6360f16a2. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/US3DF2259374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe034500662b4306f6bfa24a2bae96ca7a5351c0812516c1d2cb86ff9a2641980. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:59:02Z), 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/FR9Z62101016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d8ebd745af5a29a940068453c275a2c1ce5fcfc596f2b891030977f18b49b0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:50:38Z), 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/DEP962200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ecb13ee7fd5cb832450bb552e20ecf9b682bfe4e400dbcdc54131f3f59c11f. 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/USANG2225300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5270f6947a5fd51ef7a3496123abf0633761ecb189af2ed163fab88876a032. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DEP962200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720a5df709ddb66e55aba75f78a0502cd04731f9b50b2a232cd2ea32e49df260. 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/DEP962200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb68f8ea48ebc8e006e74d19637bfea34d796ad5bb4f2e219b0a3968e1005c4. 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/USANG2264910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e38b26ade5248696f0fc693812d993be62ce2aafafe05f118a6ce5dc0690852. 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/USANG2281183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1822d6cd6dce8253cdf69885c5dfb50a6a95ccdaf93936d49a72a3c93a4f4c12. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEP962300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf28b19812e31f33ebaa61a726020c3b4a86d92ab795bd89033ee163e7218355. 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/DEVF11900853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a00964bd0e2f41051de9926886715acb7f6dc3bd8798b9ba44e1f61d5818418. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US23A1577812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca84616ac288a24ddda38a9b0cafbd5e4197c7c9fe3a60cd8580255506dd3549. 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/US23A1577811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307c26fa5830009ebc10ec52511d9143dcafff3703232ed14057a34b2c0b6c6a. 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/US23A1577813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e83ce248a357752a907534d23c2d3f7d4cb977d3d761e86703a2a2dab99b0d. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:59Z), 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/DEP962400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118228c4fd228a8ed95c98ffb5874b9e994dd61656e529aa32bf4859e8aad461. 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/DEP962400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b04ea9b4280f43e94a4dcc503e9c15d0e91dd6a698eb95253aa03e72b1992a4. 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/FRPES2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdf6fd54666343704ee402f3d7292035897fc324c5944b7ac5faa9a94cc9d2c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRPES2500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf904c0c11124e2cba4221ce56035940dc50cc3430289f28fee93632f72ed03d. 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/FRPES2500250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976c939dd7c996ff26dbfb81d9c1c5a7f4612d74e6e4eec0446f2cebf4d3e0d1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/US23A9729396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf095663f9eaaf326f8f1f5fd243753e6c59842772c0d128312e23b094fdc4dc4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:10:17Z), 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/DEP962500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc221387c18667636d3b6820be4b2a9f8c4705560f19b9a3ba63bda0e682a1a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:41Z), 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/NL8RL2556049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf28b19812e31f33ebaa61a726020c3b4a86d92ab795bd89033ee163e7218355. 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/DEVF11900853.