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 0x6935ade3c88aabd57d678275d20d0b452bba222051af7821824e4a3c2cd2e0e6. 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/d1b4e5d7-562d-41a9-9239-ee4a4a37c2fe.json and https://artists.proofprofile.net/proofs/artist/d1b4e5d7-562d-41a9-9239-ee4a4a37c2fe.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 0x6ec5c20b23398eed0f92f50af5505f7b9145ec2cc95f41c82b11559783459415. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZVEM2382387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6146afd3d2f54307d0ee1c5e2e8d3db7bd3a753da357391c6deee714ec4afa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMANG2251650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c5a00c6596467607abf0621fe1f7b5385b438dc7854c37a8013048add00b19. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMANG2251657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184b9b84b2f2e5cd62dd1954541017babb199c406fc637dea6d7c065580a008c. 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/USANG2364355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b094976be6c34a4b9316ee093da6fe6ed0d4919c06c9783d43e089e62ece2be. 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/US3DF2334768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c6c6a18a6223b37cf97cd1b5b6a416e549a08e6a84c23be50841d3f06fa43f. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/US3DF2400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f7bbc00d97a33098b6358b333249c0a3b5b8ce4dbfe6e94bef7709fccec54a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US3DF2400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430a3f7eff4f1f89188ee8fea50875d50945081b35dca3d35c782347c28cfb01. 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/US3DF2400397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab32b5c5a6ada5ad151750650333310967fed6026c76002518389121aa4f0b13. 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/US3DF2400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295abe597c20a038b7b360f225bdb24676d6f2282e735f8bf0e562640ecbd0e1. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US3DF2400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec494cbfbdc43c0a99a1516342eab410025468d4ccb7fd7cdaebdc01dc2e991. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZVEM2397203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f124b2f74056630ae3e247b04421a0bfe7bc3b2b17591201575cf507a35c53. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZPEW2405728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639535543ff06cd56abc5866182cf6047747f594b3148eaaf80b6b8b439e93e5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZPEW2405729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6b20bbd250c1c4c4fc7fb7d7fbd21473d8fadc03dc3ffe853b70451d10e2a9. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZPEW2405730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe8c66cf23f140a7ed8fd7c46d245b8fb91fd927da302772611ffc80b74b01e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZPEW2405731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8beb9b19bfab1324312760c10ba295ba61b351a5cfd9025d20fe6823eb0ce17. 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/QZPEW2405732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2c4b350c3d53b4529197fedefc50d74e7e747a108d16b21beec6725aee9203. 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/QZPEW2405733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d430fe22d277aa4d745e8b816e837cd2c7f1dce274f86d8151c74646423c7f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZPEW2405734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb8f00104b1f7b248f83446c9bde380a4911be7c3fecc47452c6f36f8122c0e. 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/QZPEW2405735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8080a5aa43eaa289c10e4a6e42860cb77ef966ae49ee87d7a8ef2c11854a9cae. 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/QZPEW2405736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55617de5538e3f6d2231f8c3677913d36964635a7dcdfc5bb7975bff95b9d84. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZPEW2405737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26e1d797e9461862b6f19d71031654c68073f41571bb81f2fd0f8279203256a. 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/SE5BU2461958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132af7835f2a6d1cf079cbf5c83afad8cdc3bee07a23cd93cba9ce276e8964ed. 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/US3DF2426094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa54299792af96c4aa1f11d681c7f0f7210ab0a7df8e0897838e11d3aba234d. 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/US3DF2426092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236880df299f81d0209059239276ea6b520e641fb6b871de188810be09428eb9. 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/US3DF2426093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779e05f2874010f2a929133b17ec928bb9708c3423358afa04799bd189bd8422. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US3DF2449704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c271dca408c851f4475ba3d16656c96926a17b43fe6888686acca19d34c01e7. 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/US3DF2476983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a72d9b928f95a4157aa99736f43e14372bab994bf5afe530e80ec41170ec7e. 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/USANG2437920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017c33220920630e498e48da4a6902d9758aaabd61e77f1f879eef20251a9d99. 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/USANG2437921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050e2833550463c87fa1a32728a83b67fd172880ebb3b88344d8d92157b56b94. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZVEM2555201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2236abf6d1a4f10ef01026d8b02fc5d90199ac78eb2856d5c43792a84342abb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZVEM2555212.