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 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 0x098b3fdcba0e88cce91808ffc5f4c1d06ed2af52fca82dc8fe86f6d1e859063f. 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/e6e1dbb1-74b6-4b91-b82c-5bf5aa1dab7f.json and https://artists.proofprofile.net/proofs/artist/e6e1dbb1-74b6-4b91-b82c-5bf5aa1dab7f.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 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 0x0c8745d341fab529a05e2d93b0805d5724e34cf74fcb7bb2fe9b674becc8325e. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/CH6541752155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a975958dfaebed7515de4a0179c878d68080d249807f1f0b1062d1e3aba51b. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/CH6541752160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aff14bb95656fe7e444d7c1ca3f55d18990bd041e394ba593cdd1daaeaa918. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CH6541752163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4784d1bc9217045868e2188ec7835209dcfd9b366013f3a2710889e4c5f53396. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CH6541836386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022010637e6dad98c0b9e7c527e624ca29ef788abd456a33036abfa759e582fe. 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/ES11D1800134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2def5bdd7a1f33f5083bb9cf0141c53daf01dffc88b28764dae069d29f420232. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:25Z), 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/ES11D1800135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697655f3315815c40ce3a4f76fe815febc2120f66f6e3619c29511c0c39c32cd. 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/ES11D1800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fef310a12f5eb0ed3390ff11a57a8835776a284ee5a542d6ccdd71c62e587d9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ES11D1800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198e6378466da91796d683a82c605db98cadab745289c854a65fbc0ec7a4e8a5. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ES11D1800139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f514d4b9be595dbc141480878a1c3984e5ac1b0850621f516fc1b4b094fb8f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ES11D1800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b242df73b9e10a9d680039df6698c249f975bec5a28766c8039e64567e1245. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/ES11D1800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe2ad02f5af9cb4b19fb05d9b6b804e141e7aa19991a52b09682be0bf32fe01. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ES11D1800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b0bc1a5968e7e8c1b1f4cd264993aa53496b11d64faf1e3379ebebd125b113. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES11D1800224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b81a92d305c54d029fdd15161f2b62234751bce6e828b68fb7e45b19dca1b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ES11D1800222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e101a87c81a824df46fddb5788e42528a64cd46810d7c8adf4bee30ece38c58. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/ES11D2000295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc903452e46a4e242464485fe947afc423bfd71366c39554a7be5b105072da052. 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/ES11D2100473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5826e523111de229d01e8242026466eefe3fa9fe398f25c47db2997a5927ac. 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/ES11D2100475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47acddd2198142dfcbe3e92f3e6c9e2670ec5586ed929b41ea3510776e4e8fe3. 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/ES11D2100476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6aac211523742b189bd3a3e75c00a427dd75c9693010726bcc1a9faaa50887. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:33:39Z), 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/ES11D2100480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eac571a92ee20968a43955e18611d5c5b6eff495280561494e951f76a5e3d0b. 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/ES11D2100481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eebe363d61bfa553a99356537d919c61acbdccbba5994b61ebd15e05079940. 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/ES11D2100482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531d38503a7e09a023c8af0f6c1c68119e790541e4a06303eaf058e6ac38fbba. 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/ES11D2100647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054ce405c3cd7a86f64ca68693bc4f7bbf9f329581c8cca9e657624fabe1ec18. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/ES11D2200762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041670d00a30226d7ee6f2a5cfdabdb91e4b75a1fa63db9f4d84af9f17765f3e. 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/ES11D2300829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9764597fdc66e5477185f3761061b22b7eab677657a4aa7ae063d0f1c849d7. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ES11D2300851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffef13036d8b16a0dc4c494ba48129a49ac75b7b0a4decaa5005a39cacb80fa. 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/ES11D2300852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196204c5e34700076d1183f57462bca26b9bccdc42a9e0b2357d5b9d704aec9d. 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/ES11D2300854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11de50c4215cb2f2bbd0b6ed546a48e5d59fe4b1794c04297377f3b7259afe3f. 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/ES11D2300858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9ca266664ae81812861b0311b10f8ed2618a36047bfb96e741b929dc943784. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/ES71G2403547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e6896932f9ea35e6e441a4dc8be67b3d98ae6ae697be9f19a1cde172f3f7bb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:39Z), 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/ES71G2510643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e6896932f9ea35e6e441a4dc8be67b3d98ae6ae697be9f19a1cde172f3f7bb. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ES71G2510643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff09281f204e8432ac736ddb1807a5ce994be668869446c5798c33ca1bff5ee. 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/ES71G2505224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c138eb2433680067e7a8afcd066094aa1b3d28338db71ef3ee3a2e99e6034. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ES71G2511042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5943a8689355910529dce944b02671544b4b71ff5a686d8da7f67e70fb4726. 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/ES71G2507697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147483ce2b9149ccb524cc24160c4a7d41248eba5236cb36cc7764a58a5a4f50. 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/ES71G2511043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8cc0f73dbfdff6c1aa198f885eeadf35d839a54e607a23e6f9a76ab854929c. 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/ES71G2511044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd3d919767552118f79c210258a6b13b6d8e7f4864ec054bfc0230ba339ce53. 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/ES71G2511045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902a5ffedb7b87df56da53a3708c1a51ac203b639b6c4008683151f4bb8bf306. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES71G2511046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0976a0fa9bd23f55bb6f35b7e6b1fd759c2ad636afc75a8cd4c08f0380275bee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5952006409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1648d7e4ccd301e2e3a80b32b3191f3aee2b64162e87f90041f1af75443fdbc8. 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/ARUM72100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57b93c6c2f92a17375936d3fc7f9b56d809137c29ad783c4fdeeb9105ff1700. 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/QM6N21756375.