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 0xc7f36ea3220bc3a54b1f3fea8ad3575417298309e6e3f4567b2cf80109767948. 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/15b44e0e-6ea9-4e0f-b505-1e0c1bd83c6c.json and https://artists.proofprofile.net/proofs/artist/15b44e0e-6ea9-4e0f-b505-1e0c1bd83c6c.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 0x9e544994e8aa02cad97a45208585287218122d7f499e17af6aa958d093e02f19. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBSMU5182109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284e838fede40a864d22518e73c60b4a3a7f377ca9c96e6a02cde564a8821b80. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBSMU5182110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1559f0e6913d82d0b20212b054aa00c02469b4f7e513c572360b182d61d78675. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBSMU5182111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161dd1534ef2ea8029d2e01be329bd5c684392c5039b48dbcaa82a69d4f82702. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:39Z), 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/GBSMU5182112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565b052a00a7628e2d19bf21079c23bc4b38dd1b6f9384a544b5a805ecd42022. 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/GBSMU6657629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859c8175052be85880dfa4e67d942025f96abc35cb318a77a1c5bed21e82a34b. 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/FR96X1999954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb451df86f248408d9ebc132863ba1b1da986c3d8ecb40e5d5d20d56bff20a9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:56:54Z), 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/GBSMU7308976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d3a5c2b9d2bb1253d81a0b3bef7e2762b15e533c6970caf65b9454b7639405. 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/GBSMU8018176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a2294bde97d17b3092cc2b9eaacf971450d6e4fbf6055be21d70819a4f320d. 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/GBSMU8017253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1268a217d5aaf0a894f116b454d4a329fbe529631c55bae8d457e3b6a184a2. 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/GBSMU8164373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3453749dd1ebd091f6653eb3dd16c98dcf53bc913d2bda56f8e83d309e710626. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GX38U2136641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54dca4fdc4f7112dd2bea8c86ab19f854986bbbcde07919de63d7ec66b34441. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/GX38U2136642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5479b767cacb7b3f75b3b2b69d1bb8710946bd5b5b6ac5700b30028fa82ac5ee. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX38U2136645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1d3607616f4b727ed80d73df80bda638f7a81bbb7242fa77acbe959be8375b. 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/GBSMU0058157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940ea595e7337ddeb3d33021d9655bc7d076dc9fa66c911738dd9ce2955ca713. 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/GBSMU0059559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6633a305c1733896b08f7ee3cd4efaccbb4fb8bdcacfbd19d3e55fc2bdb73064. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GX4R52233873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdece60c744615810a07c8fa16eecd9b7ec14fea99a482201c0619cfd6adced6c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZNWZ2208792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8db62e34b2159c6b262a9493a0953b59a8ecc2339658324393d18328d20c25d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN92334772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78caa498bbf8fd16a817cc509217d2d0a50dcd82892f1a6e7f5b0cac57aebf0. 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/QZES82407236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea9073ac3491ed16b06dcc4923691a391450d4256b3db51cee8fc19ecef86d. 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/QZHNB2476733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c9f7d17dd0298f4e8039faff426eacd5ee62449440a517879fba932afaed79. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZTBD2475112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85859f99571d1d358c86061c474dfae42db7c9b69d93731e110705c89d544eae. 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/QZTBE2443762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a0f734c02996dc0ea2d3817e2fec7578468279d2a718ff0128f177976dc981. 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/QZFYX2579767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45fe1cf895cf46d2b4e715c729bbf474d80f1418beaab7337d8a60d443df2f3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYX2579769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9524dcb66d7248679149cc65af2fd7a2cb7b1226d7cee049d68c9f94df49145e. 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/QZFYX2579770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0843e94a55c78bcd5739a098bc65f4205fa7f0d23c58a4642519db0b198ec1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZES72519174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477983981607088c7d62419f80679945a4f47ae73644a1b0c07ea09800427477. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWU2594764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd47544f1291024e9f863997457241cb159713591799b4ee65c1b4a081e828f. 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/MYUM82300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707fbd338544f3d80952ca1f1e1eadd5566a561910277e21fd2782bcfaca5373. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN72054281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebf8ee66f87dc378a6dc018d0927291866b6f81a4c04cfba9c2b5ccc8f50ecf. 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/DGA0Q2429130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee73d8061d6f4a8b90d0d734c7d4172e6181d6e31592ebfa60447bf65d9d11d. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DGA0Q2429134.
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