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 0xedc8358c689c04f148dcf6750ac2efe9c797097b0fa9de594926301311cc67dc. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcea9129-e15e-4a6f-b932-aa23bcb2fda5.json and https://artists.proofprofile.net/proofs/artist/bcea9129-e15e-4a6f-b932-aa23bcb2fda5.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 0x06f338dfd4531f1124722b1cee43e068a42a9d64544252a7f22667471eedd77e. 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/QZ5AB1796553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b9634731505bf18be20afc4f760448051a144b405ad49050972e0129b6793c. 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/QZ5AB1796560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae210689723b94e075f060129337cc9dc3905359168c01f10a2d81c842c1b43. 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/QZ5AB1795481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97742f86cbb3a585a0cd5372b765958dc718e74d229524416f0836a25552b59d. 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/QZ5AB1795486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68802eb49b8fa64896d79a9e0ce154521d9071bb154c1d4d55dfc1c4c56257c1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZ5AB1795491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69114fa202cd60fe529ba84321872cbb4eec23c78b34ada7e6d638bc203fd48. 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/QZ5AB1795383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13b5ab509da8ff264340b333e675bf34e7731c80be05dfcb54314f2ba0dd454. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZ5AB1793672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c119a8c7e96cc3768b1d998f6ece2ccbc757b3eb3f322aa8b3415cf615cb5e. 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/QZ5AB1793673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb9d44dd75d4fa5a1252c59dad0f1b992bc5d3b7cf00c8deac5eb1c362c1287. 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/QZ5AB1793675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29035a87c800c19378515958bad0230e98e818af2a4f57d1fbb021ae3c482d4. 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/QZ5AB1793679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aa23334bc97b04e6fa52d3036e4f12bcc0c97873d42d19ed021d390f6bc8e4. 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/QZ5AB1793683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0099f514bb595e7eeed863f3a2c85c7cb8866fd8121c8bc9444783f2ee392e2d. 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/QZ5AB1790292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204769dca3740e2308d2287254dcb5cf644880588423a031e798706dd6f3ec76. 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/QZ5AB1790293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc308d08f0efb3938549e08d4cf867d7084ce6c1bc346c2b321bf2cf7e683b227. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZ5AB1790294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa90558b73115484098d7e3ed72ca6f025578c1b67fa54764ee3985039fc6ca. 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/QZ5AB1790295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a5c71f5e10b44cf991912b18728ae091147b7b0356d7e1885dde331f2271a9. 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/QZ5AB1790296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd655421d5ee1d066d56fb177737beba10afb784ceb1a2f5374177a4b91add9. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZ5AB1790297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e49bbdfae5c7ca2c12e1ae60e7592a5b0889bd9c7e9edb2a15ae20e74cac43. 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/QZ5AB1790298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d773e54528b6710f20c197183565f71230369616057dd9f64a6a273c65feb4b. 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/QZ5AB1790299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f1bbd708bfb4e43abfd5d1bfbe6aadeb8c02607d5518e38c45153d4d6c1783. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ5AB1790300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e27a9ded5ac145de5184595f40025805c7eac273c5e1b9ce4fcd3c1470ede5d. 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/QZ5AB1790301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9286723eaf14b9697f2c34a486410d4b84fb965343a7a3c39b1f18ab751d33a7. 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/QZ5AB1790302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5211135ecea0eaa1e2791cb2661be14babdc706036829dd355200b61190611b. 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/QZ5AB1790304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331ba714234d25cf20e17b1a0c34a3a459d7b0d219942e4f57b3950fadcc985a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ5AB1790305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55af28d163bce2dba4a7cc892cad09e7eb7fcaed1038ce67cbcd9bfd60aeffa2. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZ5AB1793159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fbb9a5ad9612465518f0d806b861b1af167ee8d09f14dc0b4a6d8771aa1b62. 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/QZ5AB1793160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa088b6e7a47703eb0578230d5606130f36388b51d85ef053f260d57d31e47ea4. 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/QZ5AB1793161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907174cd95b8b11da311d96ed55108a03a9c31fe7321a811a5fcd42e510226ef. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZ5AB1793162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8568013e7d8e54b31ac1c97c70516688610b8dc46e15bbd9fead22371ca224b6. 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/QZ5AB1793163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e8b84bf3d8346457e3c304d70af290530fab27e61c5ba925fb562db2279f42. 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/QZ5AB1793165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d90d6d5f1adc7ff08a51db1f488e9b34ced8a93e38b8ec495989695bf5688. 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/QZ5AB1793166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a039513a424d3c10c16c832ab26dfb60260ba8289aa9a2f3384037d21755f9. 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/QZ5AB1793167.