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 0xbc53fbe77ab63faf01016f2e48f57a2515084c4475fedc95953620253c531896. 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/f6ccabec-d612-401a-8743-b91ee9b9ec68.json and https://artists.proofprofile.net/proofs/artist/f6ccabec-d612-401a-8743-b91ee9b9ec68.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 0x69277c1fd367acaa6459548c76b7f3364a0995aa364e7d1caf2708df15690bf6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P1362111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4705542978c3e76071f85966f600a467ec13ad9af7138dd5e2436015d5a1f101. 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/ZAA161100415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cf4fd859531a7100eacab8ca7c9d5095e82178dbaa2a51d8a0e49224b39bc1. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/ZAA161100416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e64cc54df49e94bbcd11f453c700e7bbfa4a0c87e856a5ae730b79176bfd889. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAEE1966969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7f88fa553fb29f7e742dc8dcd033ffef48439f897dff92d1d523276724df02. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAEE1966975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7d4905be3f931bd9b91cd505dfad95576caee6e829fe9175052e8a04cee2ee. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCAEE1966984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a33cc89e7f3c0d1075fea9d27daa823f4c93d9fe022994e2f60b3ceee3f8922. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ZAOPP2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba45bf90291d5ec9da04c93e9be94a86019979db877264f7b68de6383ac15e9. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ZAOPP2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684919481441b970b9decf343d217d91a93bbe2b4602ae910608464fd94bd9fd. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/ZAOPP2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7798b5456fcea0027a36f408bebf9721cfbe786e4a6ef76edd28933f26229f7. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/ZAOPP2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c98ede27443c5a00afe5cbe3db899979a9366fb3c1ecee0a9e9b7605b02a920. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/ZAOPP2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711a3e7f600cc5dd9ceb2147685e7f3535b5300d71f3f66441b8bebacc9840ba. 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/ZAOPP2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f1fb2169012b1d8d5725bff32aada0c6de38676d687fd73ce39ec2672b6d35. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZAOPP2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e3f95f945faa70fae9ee818c7d69a275864cb4ee730c6d3d4e601a31ee2e4d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ZAOPP2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532761c6f611f51e800ad2d898d11faca7d1d0eb83e2e8cf524ae31689263dbb. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ZB0PP2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bfee242dc7b7278eff2ca1e37d5baec6145f1b13817d00f49e76e3a818b32a. 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/ZB0PP2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf156bcf999e90e45388001b045fa111665e173b0f32b29cd5c6ab2469797fa0. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/ZB0PP2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463ced73fb353b8eeb45b16aa64fe1dec7de624c49f2eeb7efa155e3642d4f59. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ZB0PP2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc519a789827e8c1e7c2cf5910fc4ceb4813a549aa4ec9481fb750670841d9ff9. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/ZB0PP2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf0a37fcc5cf29ec50acffef0b743b8492680e78800f101064c70cf4785e354. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZA0742021012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9008a6020f84c966c7cb242cd234b70fd99cb975c28cd2333de90733c163a5da. 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/ZA0742021020.