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 0x010afc0a9d6db8fcccee00628e22e90e1f2b5ac098c2cbb404be9cff9ee29340. 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/68f9c8a9-7959-4ef6-beba-b1b00e8576e4.json and https://artists.proofprofile.net/proofs/artist/68f9c8a9-7959-4ef6-beba-b1b00e8576e4.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 0xa8310a7513f65393a9885e485b5beb6c024e0823d1495b16b1c2b446d3599a11. 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/QMDA61394251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1239b4a5c33852bf2ecdf8914de6b48a791d7b2db95d891b9902920f6892332c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QMDA61394253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd521dbec3f1d2d1fc4d722da17e0810b2779f5525a03281be19cb75fbfb9f0ac. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMDA61394254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411067f19fdb0edb9f3f3bd2151628d5c1199e1da23590801d09a20a59178b44. 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/QMDA61394256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1ec20a161ad849579cb1a5fe228bddc2cc7ec9ac32c4e117652add452680fe. 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/QMDA61394260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f95b4927eb043c20c1defd0e8da5b77b8824e69bced1e4214aca9aa3fbc22. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:03:57Z), 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/QMDA61394261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011e0fe4df2b1392beca8939e0040be2c2f4e4499a1b094af42db18c73288fec. 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/QM6DC1662996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e0ff7977241910dd928595f38dd1b36dcb3117c966651d0831a1a251b9e7d6. 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/QM6DC1662997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011e0fe4df2b1392beca8939e0040be2c2f4e4499a1b094af42db18c73288fec. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM6DC1662996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e0ff7977241910dd928595f38dd1b36dcb3117c966651d0831a1a251b9e7d6. 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/QM6DC1662997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1d5820d2972c97c7646e3ece0722c1111a4a06ff19a45dd82869e7a01c184a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM6DC1662998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b82b3ee27c4076614aae9fb9930e0482ea81142eba13b5a148c3c856b3d882. 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/QM6DC1662999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ed91284e0a645d159328bbcd716b1c32ed79068a5bef26955ac5c9f6dcea97. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:15Z), 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/QM6DC1663001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480123a9737b4d5cabfe69f863a9fa62e1c4a4953a03da6a1f645721d2a57e7a. 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/ES5372200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a33b9f10df58ddcb08717abf146fcf228e104ac84a12b36a7fcc4b55dea23d. 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/QZFZ32426194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd00afc8e424ecdcbc3206683d907e6d4b11a478ec0a3e31acfd041dfba04a8. 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/QZFZ32426196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76037f82063f9481c510833cbd6cd2e603fbaab3bcf2c8efd6e3bc24ecdab27. 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/QZFZ32426197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611f048f30cd6f8de4afccd76ecc84547d48d137954c985b1d00f6874e388a25. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZFZ32426198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4751771ecb3c3c01f5436636136746a7888bc7414128201990cf6cc64ebe2efc. 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/QZFZ32426199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27cb06cd84b4e3499806e8fa9f5b4b5496a83a379feec20b83571ae7b4d7cc3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:25Z), 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/QZFZ32426201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95be373f929fcee4157924868b8b3d3ac40303c42ac7f1455e6b31908b4a0e89. 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/QZFZ32426203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadf748f7ec192196dfa9fbb797b14419785e5fc4ac01597d9f10c5f53738c5d. 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/QZFYZ2475058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b76e47bd8ef19168de895e5b3446fa2add91e767c1dd336e20a1d7ab626d48. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZFYZ2475061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5807b59eae3a322fdea1aee9832539a7d99af19e3b360bcb1fc601107c9e8c6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:22:52Z), 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/QZFYZ2475062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97945700ad1b4d8e7dd5a7c62f53b9d14c425d9f98a568e044902b1e31d45f3. 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/QZFYZ2475063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553234e2d5b6d98fd7ac519e61f4ab7b082ac477502a086928d52c5b73fd6d46. 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/QZFYZ2475065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c097a88f65f2bc13598df88e154f9099db4896bc13cf454d4f96434154465e1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFYZ2475067.