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 0x0188cf073a824bd3972c5d7797b5a4a96ec4a097ceac1eed343ddb44b26aff17. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac114ac7-d989-4b28-a58b-17f7c1efbc45.json and https://artists.proofprofile.net/proofs/artist/ac114ac7-d989-4b28-a58b-17f7c1efbc45.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 0x762f60038df1ddc163a20c5d66d847fb835a9d9a6dc099389bbf0c30f7f9d473. 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/PT6GZ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7795e45e0824b7233a6c30e4780a2220e2b415912637adfc2a79a646b6d405a6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/PTUM71800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f445d9c4bba2cdad8e51eef1d876b14b7124472b9a00eba106fc7b8f7a81a72. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/PTUM71800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b118b48858a85bc0c3cad467210c2bec885efe6c89891de8bf6d1011055a8a6. 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/PTUM71800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e967eff9a0a34883cd1559a4a7bda27a5805f17a0ec8745e36de94d8dc5ad43. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/PTUM71800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6daad56a07018334016fd993201de1f429dd79c5fbf66c9c5626e5d282ae17. 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/PTOFA1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562e748e10e1e01ceb91de0d3f39f932478bdca7d75947b4f7049dcb409b8cec. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PTUM71800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231cb10745432408f700ecc0a45c6d5acc7b71bbd613277b50e9942ff52cdc17. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PTUM71800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5839102ebed33c36ed8b6272bece3bfa8ada89110dc503ead98b99b16e6c11a8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PTUM71800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48db6e037de2d1fd86b5c938a5dc5f172161a94743613cb99f7e2efc42af7180. 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/PTUM71800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bd978575234f391e377e46ce0f5824303e4484d50daace512802ab39c6598f. 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/PT9BI1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc6ca61edc6ff1ac926d032275b52da7747f1b4adffab3a492d6ead1cb1e27e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/PT5GZ1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612a60effb8891e33cc3919110b1405adfee583ddb8e410f7fd915afaadcc1f8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PT0GM1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e8d594cf8b149ca4e3d7754c96fbe20be61fc20a375e561d391bc8939d6fb4. 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/PTUM71800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b3b89c3c057abfe15a8cb506d75fd3afc1a261cdeaa49d3d307c4509535a70. 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/PTUM71800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9182a994e6a5b1a643148ec010238fb87acece1342a9cd7523ce29ffccf01c3e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/PT6GZ1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2328a42affd76fecebc87f0fc187f81e2a047c26846b64eafdf45d54c7e001. 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/USA371498139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a169d820901ae9cd1b56b58572af3643ad3b76cea899110de96b8647768b1cb. 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/USA371498140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d54254d3372dd192f964f7558c77f39beaec223352ad19d1918d5ebf0a5c6f. 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/USA371498141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93797d2234f5a536f42fa15cc740dfa7580182b42dd23a21521bebf20df0de2a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA371498142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc9d3cef5e030e264382e98d3701217613864dc707c1d102fdc6c5dd45a9ebf. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USA371498143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe24c8afb09eb34de4ae1b2b8a89ace78e6c97a2a9da3844dde6579f8f53225a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA371498144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e0c26040d3998d567c0a6cd6f82579b302e58eb1a6acbd948b29824854b900. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USA371498145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00e07367c4e3775e85ffae78db7e65fae9048e14ff4978e75bfe3c77093951e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USA371498146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89af467cf210bd7611acfd51133aa700fc3141ebdb21f0caf07909d2c82aeb5a. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USA371498147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65b3796ce45e4a37d1d9d201e6b024083fe6750b591c306222dc1f5acbe8d62. 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/USA371498148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638100d3b9904ccca1ac587d4a8054e4bf5a35c55ce8f5cc3b3517cafddffe2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA371498149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aa8c267f4195ab2d5c944e49ba739660245c543b454b06798b97bebf041776. 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/USA371498150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca50cc0529d245b378ed67b8f9bf7cf8c081b5d2c0d06326bfee98745e848283. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USA371498151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6792ff2fd94908b5a69c5d2fe251d6e1e0ef0c632fecfb78c0e93e006a3039a3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA371498152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe758cedf5652679058cb14ef03eae13b413fdbabeca30a1410932a2c5c6986. 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/USA371498153.