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 0x53619593be9457e31b17a0fe4a6cc66e593688309e181f50265847ea55554ff5. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be3fb7c8-7adb-4aba-a226-d237de01e933.json and https://artists.proofprofile.net/proofs/artist/be3fb7c8-7adb-4aba-a226-d237de01e933.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 0xe832aa5a9a365eb3f1e84b96d6e1cb0499678e6a0527688c94c7f99e7b8bf289. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:18:02Z), 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/USCGJ1554722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c96e88e6408e2e0e1c8f6c58ed24fa3908f850e46212a5f1f6a7062d762023a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAEY2042265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d347c6007551b907a34e902594e5ad6186ac59b7be87e04a3a7e456bd1f8119. 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/TCAEY2042289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62131244d8f5827699587d5f83577130c476195aaed5736be9b63db28f07f418. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/TCAEY2042305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6810e77535b315caed6af3f12e407b8110f4a1a2aab659a54d531f4ae5bc0c17. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAEY2042307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ba958e2e2bd66caf02a9f833fbc8bd2763d756f3ed39f7521c39f856cd7db2. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCAEY2042311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe27630ae870040f656d721401283917866b7fc410f7919ed3345bb0d9b86ef. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:59:36Z), 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/TCAEY2042345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecccee58ba1852f813141b4b6a048b492ab3e053eb41636fed49104d4c7bf79. 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/TCAEY2042199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cf18ce6d8676b27b3a8a52e0a4ebb1dde152367b14379498c132e75d7ede99. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:59Z), 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/TCAEY2042207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92ed3a4d0c80cefae66f4e9a78d2128178150e5273663506341b1610e61e2bd. 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/TCAEY2042217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eac2b40bf62ec71210d6e2488ad5e44e2d4a19b2ed76f0b2aa5aea8cb91fba. 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/USHM91818622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb3eb28a7272df493536d7cfd308fbe18a7475212143287f3bddf6caf5da9a4. 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/TCADW1860907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380f0b579fcef9d89839ea07762dcff949966e908c80f7c7eeb734ddbc6e9748. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:24Z), 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/TCAGB2218470.