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 0xe0ff425a96d4219f92b415b3ecf6d47b516a86e7b50dfaf1b7b67909b7cc1633. 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/c47a010d-63b2-4968-998e-2759aca6d910.json and https://artists.proofprofile.net/proofs/artist/c47a010d-63b2-4968-998e-2759aca6d910.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 0x2e08b2b6fc1f78bb825c3d63ffdd692b8cce6c4de9b1ebca09793d3e05ee6501. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX5MY2382054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0eb2d670951d4eb8a521ca232a92e2a8782cb20f51767e9c6a9a36b184204dc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ8B2341788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee3db2d1b6379befa8cd4afd44a1a3bd680dbaf43035293ee2ec4bfcafda681. 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/QZWDE2317321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ead72aa2ce12df58d8f776c48c089395667cfbca278fbd031c242599dbc4ef4. 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/QZWDE2308246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e70923a35485d1aeee45aa72c7b23bd7803e27bc83f3c4fe7a53a5ff2a7133. 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/GX4R52357679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4980fc2c4ddb2a008efcb13c846c35959ec25314bdd137ac83e1b3ca0766bd5. 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/GX3HH2341318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425ec379b8d0ae8099b12e2be480e34c61b21154f554ccd1a7bb1e09776824fb. 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/QZTRX2335159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3988527a7ffa45780e04bf73bf9f48def9a25d231a5579edd5a0ad702f4b2c5f. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBRKQ2377166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c352d04a331addb1b1327ca139aa397c50e5e64bcc8ae0291b62855742d9e3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTRX2395244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028fbea7d3c086d356d4efa193264c798df8c1fc54af297e7f4e696f9aa48c47. 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/CH7812351070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cd029aeb056d6b628f8761c9d54394ab652e4cbd8d2f64caa955ac9f401407. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH7812351071.
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 0x08258948b07e5dfaca7e4d7c069dd4ff02340404d81f7abbe9aec64798bd38ab. 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/QZTRX2395127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e9c1c33d0c5c0f4ab784b7a063351c89be231c330f08dcc40115987e40d029. 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/QZTRX2395144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fce339e8208749200571eebe4c34bde7600d782fbb41b21855084bc95312ee. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5FN2389733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee0cd3b8cf9313d88926b8592eddac14e3499f1b599513edf1af14933a2a7ff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTRX2352951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15797b8674f00644a4b97b4269270fc2b76c3956a9a9fb2d253029d70c85810. 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/USLZJ2374450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae73483483aa51a02a8901e0b71a08d75f1d28a10101ae470880f03adb92602. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX8KD2320880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cc3a023821abae7ddff6b7c1b79d2e71c4717296e1b5995d813880512ab712. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDD2290904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46529ec2e6157154749250affaab8de09ea3f2f7e3a20e08676abfc0d3e2c0. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:21:31Z), 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/QM4TW2308582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c768393fdd64564f0dd7d44806cc47b2f6fcddfb0a4fc1fe2c7b3d14916058. 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/GX8KD2280488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c8490bf6fa2e80226909ce0373d1919afa6c244627a44071a50b7bc59fbe18. 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/QZTV32265212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b11bc56bc46a5df421e697018ee146f0e7d1b7414ff8b232c01165117c5340. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMDA62271011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7001f0e1e05fa25746dfb0025d3acbf0cc8e7e8e6d1f088291c9443ecfcb36d0. 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/GBRKQ2252722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269d057c17316e48e4ee58433b90990796b7f2b654d81621f9d9ab98f6193a81. 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/GBWUL2222070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301814d27f919c78b2d7db0dcf24057ab5dd637cab2893086f7272d0881a5b5f. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:28:20Z), 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/USLZJ2249169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5113489e18c9fd552790650ebed7fe25e42f995170a2480b6f98139bc2b367de. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBRKQ2252707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a2ee5262531612e8030f7b661dffb4f8db12626e99de04b6f1be19fb661658. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZQAY2221808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3387e82b44662bb4dc2d86b8627da7560b9f7991ed5051c886a6d0b499fa6a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEXN92260570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19692467d3c598f17a087b8ce4fa494c77baa08249cd63e9afe67841bb49604. 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/QZNFJ2119174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f315c5fa13d6ac2e28be19c8e7e0c0edb97282f3fd38f8773baeb6d519cc4b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX4R52198832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6bebf0f1ca45c446931266347e6c51b68cbca9e9470efa78d4369fde2e9994. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS642137916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6054e1228e2c3d75345b4b595c31ef9558fc45d83d62135de39badd086c66e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS642196513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787eaa4fc9dd10b4b346c619576cbc0d0c06b137abd5ac936f735ba755c6b16b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGWX2221229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582030c562d67564f3be9b420c3bbf115608d491c36637ce1d29218b5434fd3b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMHN2071862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575152fa7e766f8a1a313093af4d18f73b96cc2d62d59194f94c1eaaa78e8aad. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USLZJ2402728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff6e5549a82cb661ea35bb06f006e60f8251b48529336f1210c0e12f5d382de. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZZ8B2341246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef8699ed93bd49b6829c20a39ba8ba11113b2122b86d4486c4fb3c9c3ea38bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZZ8A2350383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a198e84c75524fc3adba4db552e30d221a79cfe2b3b46453e79868d87e12f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8LD2410551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091f220e71547bef2490cadd64bfd887cad3f6c81935515a718be7db91000980. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8KD2440845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0167deb421b12bb082df98f82cb51c4d8bc839d342debb86ae791a1ff0e94d73. 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/UKXN22080749.