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 0xed33f2cf36ed3e010286d55b917765d2bae7333a12cfda7379b5c3dc1de979e6. 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/0212423a-2c26-41f7-99b6-96136f447296.json and https://artists.proofprofile.net/proofs/artist/0212423a-2c26-41f7-99b6-96136f447296.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 0x42ee4716acfceb6c2bb3bc3b32ff0e592e8801e259a7184167441a2221746b53. 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/GB8KE2204199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87dfb2df675ff2bc65a41cebd0df3fa0ebb5f126182fe9c074301440eb62e94. 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/GB8KE2204200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd96b4e6545f08a25f82b991d8055a44fcd19bf4db6ff299f6c79c0d7f3db9bf. 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/GBKQU2410991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ecd8bd8c4cee0048f7755632dd9b6d98a444dff636fc50ae734df04e956e3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INA4Z2200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf9aff0e989f808808e6a6f428770206cbf1e476bdb8d7d93aad6a7c426fb38. 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/UKYJJ2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa971a444bc79a367b216ee5706d242a229727f37fffa1567157ab1393e3080d2. 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/UKYJJ2000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076319bc0c8a6ef6afa64c1cc605c18b969545ba7b707acbf3b34c5f8425acd7. 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/UKYJJ2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d888c4bd23c075385e93f6b2061c99d5d58ab3a538d81b1de4465676f450ad8. 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/USZXT2455149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7166e949393b6f3a019ec122c1a8549bba9265ba65337d997832a9646c4f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X2342878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf068e6b537a805dbf03e1b589948c8d9df32f85be6289cbdea9cf4102005ab50. 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/GB2LD2210309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa2b753de5207745f1e87dc5381b90896ec6ffe5d099003b342b28b6a9ce3fb. 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/GB6TC2210401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fda2806b56d50316d5301819510ee52a9c413d85a80410102687a9405d9c92. 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/GB8KE2203113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd838ab0f5a34db216d95cf5c3c15f6318c013ae363ac8f3cd168020ccc6d7c77. 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/GXF9Q2413611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc83e52a510fdfea69373e30fc47299ee2ed7c2be410fcd3f91e00d4f5aa088. 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/GBKQU2532208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d559b9f3ba125272ecb566300f5703df8837ba258e9795b46a65b683d558e3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB6TC2415601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9413909a2c3d56e869e85421de42f10a16373f7fa9946e3766b81b3c5f5e1f9b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBVPL2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d798c0f493f8d5e9993b56349b33f0953981acb2093a6561a8a3c5b65d3d17d. 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/GB8KE2508148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52e262cda773000004ba38149e6a6b5fa467ff858e0d11b64567ab4aa3b225d. 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/GB8KE2508479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81923745607ee117ee809b13bbcd1af905aa2c38219143547cde78d100bb142c. 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/GB8KE2508481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d527f529222711be41aaff552a56a7dd47c230ec618c5d878a9f949abf06526. 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/GB8KE2508480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d798c0f493f8d5e9993b56349b33f0953981acb2093a6561a8a3c5b65d3d17d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB8KE2508148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8327d8f34142ad54d54f822dc2635e51cc40acea1cf8ab3e10ba18f665310e0e. 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/CA5KR2516465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf1e51d6d45f7e597823cb31a83e6691dffeb0b5bbb5a8f92b81fd5b1e5ae91. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAJH2501472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4e83b31072352238d5dc3663ce17ae07bcb3d3e5ef9a185064a1a7a3a11011. 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/TCAJH2501694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477dc0fc0b408f8ac4e044847e5c19b8ce8ca7150ca782765b2f65b206e44b39. 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/FR2R02401480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb109c6dd0fe3aeaa73ccf18a660c8c7caa5f1858febfbf82669547796024e0c9. 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/QM24S2407470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7347377cd6e9cd907e62c2aba737134b38eedcbd4c6856b24d5e9a34a6450dd5. 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/GB2LD2410579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546ec3d94202c14dc12e53fb4902c5b84571dc09f6ef2cf834cc7352430b0b51. 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/GB8KE2424513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d50e2de402308ae027c8f6df855510394aa90060cb389e3af7cb72a47df3658. 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/GB8KE2424514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bba1cdfbe7919bb55c21193d0f3cc79a12096aefa5a7056b34c4ae3e7dfad6. 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/TCAIU2442972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7166e949393b6f3a019ec122c1a8549bba9265ba65337d997832a9646c4f6. 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/FR96X2342878.