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 0x2d3769e9764e6413043e717b5a824e7533222eb495900bc8198e99684a28c0bc. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b8e72fa-1b77-411e-a875-d934efbc0160.json and https://artists.proofprofile.net/proofs/artist/3b8e72fa-1b77-411e-a875-d934efbc0160.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 0xc8bed41f87350311a50a66af5177799f3225d8fbdd4bc0339734f714ed112c12. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CALVP2467696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449cffe4ed4dce1bb80100384e7072850a19a997f28401c0eb6366ca9b8783d7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CAGOO2404042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8c299583de410dfddefec197a329e31aeab50fa91afde999a15df346026663. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZHZ62282784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b0b40fcdbd76d2d72261ac65f476feed0deada246f8984f5819670ede2d5f9. 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/QZMZ92281427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d51ec7d70884245e99d62a5e159cba4db507755cede6d1ab801f471856baead. 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/QZNJY2239885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d30494226aa247a7b2ad9da463425b117f1147225543317ec2e0f84d40a453. 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/QZTPX2257233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a633029bc13ca79465e9e71ff338081aff8a087343bab30abb52fa8f2fe641. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZW9K2229417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe603ebb4239d47f46a9ae1f356b951b4f82a278b8d2e83503923a351aaee591c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZW9K2229418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825369dda64f67e95b81d293b33f5175b13cd00a9e8a0631d603b477d91325f6. 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/QZW9K2229419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362e05b6197cfeeac64d57310d8dd1123ceb51278f17b35c95d979bc572b27d6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZW9K2229420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183fe65d86de433f9b6ac39f459b3dcc7786291844f2d7a43869235efc74f274. 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/QZTVM2287049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7932681f19717540b6aa5af1fddec5f0fe7272f26a26a63c399da81267d1ade. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZW9L2225397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63612c5f386d2b8f51c57df430753e3dadfc8d786e2114c54f5bac0693e96e7e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZW9M2211533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0874e2a6a1bf95fd4e22e4e3c02353f6d7ec24e772455e10bad6e8f296e2cf4. 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/QZW9N2228207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337c3960139b1ea56b18e20c4b7f09f188ea5d5b9d9e1ded2ac01919fa5fe45f. 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/US7VG2390118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92d77f3b612c190eb57c2a9beb77883a3b747ebdc711399b5490a90f1eaf991. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZGLS2391558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6273c59adde79a3b1e207bf981354cc69d7741d1264af70468f7e877babd99. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZNJZ2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e40d06740b08cf5fb52be38de41e61332e1601bb574a5ac1229987d64e60024. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZW9M2305324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edd2387da28087383c85d94f28cc3a033967393284dea1da87d3c0ca39cde8d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USDY42450433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee24c33c62e0c31ded31c0971f3ccc0221e780dc8941055c92d8fb2cc2152cc. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/CAENV2406762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3969999f0faf33f9f82968520abf47b9ab5fb2bce606bd7ca90f833b292fab62. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAGOO2439359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12155a3953230a70456e7819a134954a1746b3aca187ce7fac1a532c5db6471. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CALVP2419856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83590e14fe5764ef5042a91a44739922d6ca203a2c6acf640d3b7e08438306f0. 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/CBEYJ2449302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e5625aed38d5916b2e7004ce0d33465e9f577c68c3df33d6c2cc420b4df837. 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/CBEYJ2479398.