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 0x1240d21b452695212f9904516e336b4e72aabd59863a6a62065a395d17ab320c. 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/06051f4e-1986-48f8-b680-14aca513058a.json and https://artists.proofprofile.net/proofs/artist/06051f4e-1986-48f8-b680-14aca513058a.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 0xb0cfb08aaf7ea47817eca090bb912544f9a583d254e69f58267403d668ef517c. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/GB7YL1793002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953dc04e4d64c357a41c7a492f934c279ebe9786e84e167d375bd3e6b17e8734. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GB7YL1793003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a8229eb972e4560dbb7946f5d876f5b5ea67fca4b9e03fc332371eff690caa. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/CA5KR1569892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bd1f7dbf2fdd679c9988bab6066ffbfbfcda603bd33e53a78e37eff4a6dc4a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB7YL1895301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60109594f31cc4313877372e8c4e8e11d67c53bd3bb166716eb3916f36ef0227. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GB7YL1895302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacea9f6173ce6ea19712e4eafc98baee78637a6ebe47ff77427752e7ed81b30e. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GB7YL1895303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87332e09e48a895c75f5c5e2e03ae8118b09f027362d98d2bc51ae5322ee3d2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/AUNJX1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57975c5486cace77a5d3774d9727efece3bdc9ff8bb85fa557e7a8dbffd6ef6. 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/AUNJX1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935f875d811846694ec3a9974e9c297636db492498de40a40786cd0624db1632. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/AUNJX1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8beeb02d3322afa827c24755f36544912c3528ffa90be08bcafc7fbe2580ef. 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/AUNJX1900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66207b8fc45d7b68fab0bba598baaac0bb8cc949ab12976658f2b4953f15e95. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUNJX1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29af19a241b4f9c82c8ba73c20f322c95e8c073352555aa2f4e5b924f89c8e74. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZTGW2100855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2856040a71fe30b7a3cc77e18d96c46bf7dcd509d12d9439becf2239ba5e64af. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTGW2100857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309d27a03b0b4af7546b3dae5724f435d4c22ef55ada424727953eedc3332172. 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/QZTGW2100859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e0fc02cee1ffbcdeea5f609028b29e4a0248d9919ffec34a770c107bf76455. 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/CA5KR2281663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f811347aad9115b3ae6cfae1513094c59583a85df0ca27218483424556a2efc. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/CA5KR2305064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a1618551d24977fc8a7864defd703d88daae713f3a789a19cd46510a0a34da. 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/CA5KR2380685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f16bdfeb6149144c79d19ff93f732e88f462fdfad8a71cffe89143e6d6c060f. 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/CA5KR2395083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a1ef81ed03b04d117bcf6d175097af58de1699772cf2f7ba494f13df66e674. 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/CA5KR2395084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d68fc2e880e1416489a4ac6fdcd1ee59387b6ff8b9e7e38d992664385a6c8f. 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/QMEZE1859899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc996f3849f6555f41e2a4ed46d0f2ea80349848c7abc85a6d414ca464c0cfb2f. 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/CADUT1807010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf1ace6ecd9650dd5d0d32a6190d2b9fc9a0f87d8f8473edac8c8a7a700b1d6. 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/CA5KR0004683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129174c6fb0467fa81012b3e703e5ebfe1736dc5c70f802e1391663c288f0581. 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/GB7YL2042001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60cc8dc7362b4f3ea0618248d7be2ece33078b753c8d5b324da936765028012. 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/CA5KR2396588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a8229eb972e4560dbb7946f5d876f5b5ea67fca4b9e03fc332371eff690caa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CA5KR1569892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa933693894cc396574c21806f2e42e6b30811b813d5e4593e5fda887da4ec08b. 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/CA5KR2223726.