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 0xaf5b59bb77c74a3a978c05e023e46e155896c8ce6557f8bf29d08dbc4274c784. 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/1aaae252-d1e2-4b88-835e-030465ab2900.json and https://artists.proofprofile.net/proofs/artist/1aaae252-d1e2-4b88-835e-030465ab2900.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 0xaefcbeedcfdda9f4edbf8e92774e962ec4b47b0c510143fb3bf92dfd7a7bc246. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLCK41058004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753f6e657b07248ee4d08094ffaf2f6691ca218fcc3fa8ce9e05668788fb805f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLCK41058006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb8c0a92f3563ad29af1fdb16cc9d162879ab2db549cbe88731dd0bfa029f92. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NLCK41066338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa63086a5d8a23ad47b517d25775df8e7168a32865834ba37df47660da41176. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMFME2165283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48547effd383b39816f483c385b7c37426cf39e3f10dd3891d17e709cfa7093b. 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/QMFME2165284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f247f9b36498f20ac7dd570f510e4fcbba38530619afa5f423b3856f299838e. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QMFME2165285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ffe35d2dab66971f150427f21ea2ae49b3967993debcd8fa917f3b09e671a2. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QMFME2168521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea1cff234af9bc4d28e0f0df3deb16ad08351ec17d922ae92180e3c6e12078a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QMFME2168523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137bd35f874b40b64f8709a2d91fed1cf05a2ffa6ab4fe2c146dbf232883b2ae. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEDU22200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730ff8d8842db401f8b50be4391c44dbbce4cd3d1d007c2af53fa354c0d0d55d. 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/DEDU22200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d59d4904e6868d9a99d9c347466fd16cfaf14f0cfeaddcf93c99c8a4611660. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBKQU2340973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb5f6e15df9c4783ac5614574477e4f8c1cc848de4db672231fe21a2440b014. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKQU2340974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aae22f30e164bb01aad08dc76bf595f2345eb1cbcae7e81dbbb1579db9cd52. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBKQU2340975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93259c88619b8236bd0c1c00fdef77c361120b7f4e4bb6c7a88048ad49c02f7. 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/GBKQU2340976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db308830d5edfdbec9e3161e2076b149086558530dd8cc1d54484fd03f6ccf5. 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/FR96X2190666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73890e0c5008b7142e7da54763a9178e232431ec5e9f6aa46f2abda35258067. 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/FRDX62201980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f50352666b35794c6e081822379e5b670c88c914e044326d7713d899a7d84b. 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/FRDX62201990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba13a4f56cab0927d2a8396bee463eb065aa82bcb90bfff67171730fc3973e4a. 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/QM6MZ2424068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58954c32cc0cc38e809e5c38349b9153b216a99b2a54a617129ca33091e5233b. 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/GBLV62027829.