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 0xa11c777763da834bb564969986a3e9c0ddba75ccf98dc2bcf241af18d58500ae. 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/b8e6e804-ee45-48c6-9ea3-314600615dd5.json and https://artists.proofprofile.net/proofs/artist/b8e6e804-ee45-48c6-9ea3-314600615dd5.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 0xde05af759d84202b4dccbc6eb150ceac465514ed6dbb15d3e8fcabffbd5af828. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEHB41200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fc1d36a647e37db187aa1595c7838e31f88d32aef19e02bb1f62bef73f0610. 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/DEHB41200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec8a8a63e7f7234e50a1a47b496d0110aafc70bc115c0e4981b59f5ce876a04. 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/DEHB41200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998ee5c72df3521da10a2d7781edaa37969fd4d56528300ac1bf6e414b812b60. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEHB41200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad97b3a7ae136c0e986e5924521b73876eaaa898b015e0907e872db20187bb46. 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/DEHB41200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce11842b66538f7e0b3825b4ae30634cbf8ff4115c308df68395c59b2a6d1b66. 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/DEH741404878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f4a6b14da9600efd9bdc43103d448d61352ff526775bf2ceb6c6ae83a5f324. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEH741503625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d7f16cf0266a3e37d2cb579c654b1e73371478cd25f0b49e3395b6e26d1896. 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/DEHB41500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41abb020711924acea4831e9abd59801b637294d531b7a0ecf9877bc4fb6df2c. 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/QMWZB1510895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8005ab333ba5cea538ccdc05e47118c806ff4237f74cba40471227ae5fa7a3f8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEGD51406562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3615a9a7d0d619b24f0c506e1cae020e54b3afa9d3598738534b3d3423054722. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/DEGD51406567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454cbc2193fc5ca5269becbe3917919ae366d04380de33fc49d628681328c275. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEHB41700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03922f9259e0423611de04ac3c7fc3faaa4b279bd49e1edd4ccbd71353856a1. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DEH741803739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d896e46a488c645a7ca7e8da8aa90b35b60c5c73babe45e4876af806185ff19. 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/DEHB41800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b65d87eef468bfae990fe61e44342b16c44ea845fb90fb1c9d2b47198b17b3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEHB41800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0258989d0aefd00334a02ec89b81031b2bb9cc2aad89659c7413478dc6c414. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DEHB41800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde802c792a917bfd64aaa0cd5773d90856a23a30bff2f781c1c13454915372b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEHB41800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6f59e7a2580fce76da222c95c0bc5131ecd7dde6df6a728a4f61056b4f843a. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/DEH741805751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f490093ffd148d2eb3ff883a641482161a98bdfad5cfa88282463069df88f4. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/DEH741809115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafb0021fb3fba5154fb2ab46c3eb455c3817aa8e0bd6c218a40eb0ab4766d0a. 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/DEH741901231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d8888dba22493b5a5ff9fd7fe8464b8a0dbc199bdeaed7e109a381be83410. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEH741917926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb163b0f454d68b4d84f288e03f2b73cf6c0c2dcac4b64920f6b18dd79f53e963. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBJX31966096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130086e156ab3dc7484540ee61092c8372ea65a2477055dbd140a4dd591ec697. 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/DEH742037049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d9be4d34f2350c1a7820f6c14af245a4c3d37c81118e363a8ed5c6ff51a21c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEH742039764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7af2358aec4cf0d5043ca725e4b4c1c4110dbbf3e19832b36dca3cf5af0f3a5. 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/DEH742154166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc044827fd164ed5f2654937090fc3276d569d6b98869a864eff967606319f926. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEH742166199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734dde983498f9157296d815019bcd8390a9d3fbb4c18e540a4761b594299e89. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DEH742205107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c30b72828b3b31811da706686add028d55894b756bd6433b14c2518a6368115. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DEH742205109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9494f54e8bb9929ccbb46d94af359fe6ebc4809f3880d9407ff3bbf04a3e4054. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/DEH742222809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016a2f1d84741e4199c25167dbc23262500e17bed619512438db704b0a02427d. 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/US83Z2317903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb237d770048979b404229c149b2c793ee8c31f8a9faf1e397809f916c22123f3. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/DEH742405117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83bc2b9a5810e6051f73f98d9b25936313a0d8a1232725beb183f8981f30dff. 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/DEH741809110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef1ecd2d96d99fe906515bf32318794d9c9852d4f79bdde85076a275def065a. 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/ITA061301649.