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 0xf75d4533f51a2b3ac4209b8dd94d713454964b130f5c4c3491928a880d5f0035. 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/9b2cfc27-4c8c-4e7d-8df6-f181aa79f791.json and https://artists.proofprofile.net/proofs/artist/9b2cfc27-4c8c-4e7d-8df6-f181aa79f791.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 0xe51705c3565baf805500cbe6638a855b57ee92bf25ddb4315f3c974dcfffc289. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:31Z), 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/QM6MZ2017373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610d771fed257dd4534cae6eec26cc1c2d52d58d0b46d8d55e52cd5c4bf67702. 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/QM6N22053005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17021e59a065a09e4fad6b1466e7a74fdb6459b87c38da19fd471f04a15c5b03. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:03:59Z), 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/QM6P42000612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf470318c58edfa8845cc9979cadaed79d9e991e5be1a5aabe2e011809fee189d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QMFMF2009066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31999e003cc860ad446c5807532a17a5a042320af211b8e6356d500857227b2e. 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/QM4TW2165413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7191cca600422806406d913aba37aa5244a256d81506e748fb675e3b578a50. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA52255573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56ec4c083ff7a4d7353612b61055da58e17de04e3351579249e748501a4665a. 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/QZDA82231659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b1b0ae2b4397624c3a87c06b3c6ba22abc6aa05430b5c50d39fbe9082a9cc4. 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/QZHN32224560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7315c8af7108feb4c48c38682457bacf0073aefc8a2425cf208ff93ad4aefd. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZK6P2226605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822c6d3202110cd8b490c5fc0cd28062b9d3c118e4539b01e7bb4fc69b0772c8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWU2152862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7556f5c69a696d3ecf4c964cda9027e9b64e42ebac8c28b7939baf1dd18f1f7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:38Z), 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/QZK6P2252813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d5d3625939af688cf391647318f814dbead66d05d9d90b3a7b50b005090c3a. 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/QZK6H2270402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff812f8c444eb5ef079f8e6f882539c8f70c5236f4f7c017450cdbe17e12c2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB62205336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c6856ce15eb5306a7726e97a36a58bc7851c6df83e035a2617bbc01ce6dacd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA52387885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef52688d6ed4c23eecfaf2e5caf84504fbfcd387489e189f43ad15d7922a06b. 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/QZHN62304025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142b5284a098a869b3e992fee4b9e67a2c0e665b619ee3f091aae31a64b1a3e8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6J2350663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f484b2900398493b19c7696857e350b2b19a0a3ef28a970f5cb0cc78638926. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMER2336877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8201439e8005f81bd52adedfd7f48335ec796c189e994f5b922aff95dfe9fcf7. 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/QZTAX2313453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e42ec1f838a3c7b2f5c6f8dd75df4521dffc8afd481002b47240c035bf47f21. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:15:28Z), 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/QZTB32370277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d9e0c4b1f068664ab7b07bc2edbebd22bbba8c5e6c7318582f31d28012d8be. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:25Z), 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/QZTBD2316527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ad8b27a4d9c40345e02f77cc1cb536a8fb06d7c6187267f6976fd7fdae5607. 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/QZWFQ2395099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8480440a73cd0734d96db42dab0ebe052c85acfa53557812c708af41fd7e81e1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZFZ22453494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9765414d8dd0301e4efec95ed9c2ff562c88cda62a4de0ec6b1505d24e678b87. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES92475702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1dba2e6ae21215c60fb95aea7e44928ad6ffb60e33596fdb8e10f41e1bc74a. 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/QZES92476149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c7ac83c613200cdcbf5b2d7d20d4ff3dfd8ef60a52626940b515a4284dc7b6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNB2451104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a8147d3403e5e804c2e1a6b926aa8f87418c2899147321b61af6d4fb45891. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:21Z), 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/QZK6P2490744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939adf89c64a29665f08a0483bcc1b9ca157be206fa608fc3b4a1651bc25f6ba. 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/QZNWS2412464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08d4d897f8ee0132ddbc1f0ce4cf71d94a619e6c51b4866c57a861a42124896. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWT2416616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1920b5c8d27b37ac5e06556a0a8798cf219416c38bc1a902c5a21947fd705354. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:35:35Z), 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/QZWFT2478750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9915a8489f11a6ef4b49f4ffcc4c6c6adbb01aecbef73d818569413f7d800fbe. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:14Z), 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/QZFZ62521873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7c9c78010d93796cfcb7afb8fac7658257ae939467d755e4eb1e698e40aae5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA72575600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56f9f22afb18f959ebf0a1a0bcc41d33d1be0e2a0a7934740d75956df7850c7. 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/QZDA72572281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728dcf07cd47af81978a5bad29af601e42b14f7c7f9c078da175632a8702f9ca. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7P2528832.