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 0x9f97d91add8e71b8196d5e262e001a15724ebbd61de006e4cc3d61a45fffce90. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2fd6252-100f-4d55-904c-fd6fe0324990.json and https://artists.proofprofile.net/proofs/artist/f2fd6252-100f-4d55-904c-fd6fe0324990.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 0x0e46007bba1e69f0ed81dc6dac489f14c13e7d1150767e2cb2dd6a3ae745e116. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QZTB22516154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce72ccea7274b6e0fc99a582d0f33f599fb689f25917d329ee1de75636928b1. 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/QZTB22516155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11666d17b7139bcf337d0a568015cb4ed9ccc9564c95e61dd53e7d16179d86c5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZTB22516156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675708948d2cdaa6d6af100c831f7ec052d4ef16204f5179b60816a103a32840. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTB22516157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97432e2787bed7c0ac7f6d792dc90091cc58e859dc5504f300880782de0db9c0. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZTB22516158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacf55c23f3fddd747a0aded0d698647e2725665f90727ce69a505e69229316a. 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/QZTB22516159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6be90244566c0490979f71ea395b9f82d63fdbf1334d64e4722850ff1dd3bdf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB22516160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2be41c9c54d47c33857bffd892a78b4f08216e57070c5aece16da0e1ed59533. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTB22516161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde518a9055e31f2e6bc7e26025cff8281e9a4b8396caaecbeddb42bae1c5e8ef. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZTB22516162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab6ba2771a6f9600e2a3c095eb2d63d64d20d508b86c68f0cb8eb1e15c6fdf3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTB22516163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf984fce7a8db42dd1e866995f9ca0b7788efa6cf7dfdc1309ba0f8ee14f7d8. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTB22516164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1a3317d718897fe46a48ff9232ae480279f47983a4a33bba140be42c576358. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZTB22516165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251cbb5b3e06aca11bdc7a3832c7ea48a7f5f4b8579efd9ca965546713d48668. 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/QZTB22516166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad78dd40cb632fefbc828701a16673f1577df4d1e8decdcda79185e98d930c83. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB22516167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf2bffc7ffa9aa7d0e9684c0e22379a77780b1027680fa61e815acdc9dd9a6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZTB22516168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef38c1228be0e8a69dfe839a661823d0361db31f362bb407877c9178af9cfbc5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTB22516169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8298f02091dc2ec3f4f7dcc4242bc688e2344ab9fb2ae978b058932e6f571c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZTB22516170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3640551b5f4eabcc5e201d7dac32fec331ef13188ba72d1b172711209a2fcf6c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZTB22516171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fff05644d45ea9096a5ef5419a6a2fccddaca351a26f414c8a0ce4c08c5a09. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZTB22516172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e12c745fa75d5f8af35bb248db3d9f96c9a6e573ee0915a21844bf0e8cce133. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTB22516173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b69c00c893a38fe2e275b2e8dc27816696d1a81c8845f25be01fd962fb8fec. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBD2574736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc075ba44274317f87e99460f2a83ace7812e2b05673c72c2b5ee2de9dd3cace2. 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/QZTBD2574737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57990a50e2a57eef98e82cd5810ebcd45f0d28e3a273e790f2a20b1eda516444. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBD2574738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1689f888de1970ee5367e1eb0f6468626c68f680c3eee908d45d836fd4fa01. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBD2574739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bbd0a96ab173fb285dc44e15be9299a23778258c0094a84f6a6f6e3e5abf8f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTBD2574740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaa68090981b5d87a8a5cd0e690feb26d7735d12720407bca0abdcfe864f4db. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTBD2574741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698609a86882fd05fbc1ebce7a14c4ca40e095ca77079d232e96729e1cab3613. 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/QZTBD2574742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333f2d577b6509b1bee513122e7dd80dbd8efbc1fc0ca41c8b1aa5906e112b01. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBD2574743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf28928d1d82d292cd1c18d4816bfff548fe9de59edd8b1032e7ddacde273ed. 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/QZTBD2574744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb995ae6c9f56955dc75f3da4849a0e5e8829cca508b91e3671597b82804add92. 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/QZTBD2574745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed03df2f41fa3d0f3d4f4d3c4641284ea59175de2581668c71b1ad712e319f93. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTBD2574746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe926e4130f0ddf240dbf77ae51cbee290298b7dbcddbe546790a18f8c01b1e47. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTBD2574747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb605e34a2bc4e2c27c8e32ce70bcb75c97eae797f1dc9553290bd31647d7857c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTBD2574749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f2237e51afbbac2ccfb9c8b452fabea4e9dd9314ec76368fcddbbda763836f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBD2574750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6050a74d5e28efba8dcf69a39b35e730c477cc46df314edaef9d93e298df82b6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBD2574751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc390782565aa6b6c47349ce862cfde1a03a7289aa88b2d810e1acb224bd4745e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBD2574752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d25a041610e49885f5cd481338653b7362ded6352fc6b3ebb5f775f178e7e1e. 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/QZTBD2574753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef3b5414b096a2c6db99ccf859e2946e85660497dc5e99e658b3c3c690211b0. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBD2574754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944cb9feea2133aa0d70f22eae8c923a23cac01c1c8a3270cc505691524bcd0c. 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/QZTBD2574755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d2990b842691475c7e105e5ae9e23057517377db370322d59f2b4c77ab2e82. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBD2574756.