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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d82955d82070872c8896b1bc89fdc4bf5c3d750ae46d6ec9e711cd5a0db86e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23a1cb55-0c4a-4b88-90af-7a186c420236.json and https://artists.proofprofile.net/proofs/artist/23a1cb55-0c4a-4b88-90af-7a186c420236.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e7d40f87c2ba51d5f4b49291536d5aeaa31258fd6b4a2c76d9af4731cc1d04. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USGC62000939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c655546052b3bacc149231ce935f4dfd2e3e7b1558e2dfd286f8115842f4fb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USGC62000963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafa82e339989e985c923ea0a9ef78301622af3d2b16363c2a150c5d17b05d05. 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/USGC62000977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7735f90e0de604d4a175a1e52c3ecd985023355bd0b6ee528968bb5957c113. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/USGC62001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef92cd3e3d11d3e2109282d9c1c725eff94e04a4366a6fea62e269694c5fc96c. 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/USGC62001054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562bac01f6e78ae9558e40bdc76676ca033d0b5bf272604cb0ae42315e6ea5c8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USGC62001064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e744cef615c62ab92ff6bacc0d3ca7298705d750a1bc265966e7aadecd04749. 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/USGC62001066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0039f690debedbb28e39b12e1a5470bd64307a8b5496f365d359f210272b240. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USGC62001068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a36fe70775338ce8a6089b338001b1dcecef5b732e1b80036b87cafe112b7bb. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USGC62001075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f46f2b2b77c2d721a61b1cb3cabe281c01328eadc139c279456ce314e6e142. 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/USGC62001121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6787bad7f35c249030521e86443523ba5395e2212f82924e9f4b2d8ffe679897. 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/CA5KR2450315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b73328f8038ce3e15f08afd0989ddd021eb393cb98b50c40b3205de0115e01. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:10Z), 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/QZTGW2401083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b602d771628df5eb488c69af08ebcc48ea890bef5100dfa0bc4f99abef2006b. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTGW2401446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f24b2ecd96c80dab8ca93f85ba2c9f1f03b374dd1731e6e51fc561974fa433a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:06:50Z), 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/QZTGW2401447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53a1ab5e5475e9b4c947fd927b4287c9e57ae6ffb8de14c65dcfc6d7dfe9360. 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/QZTGW2402875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3386473bb14509746cfbb59cd2746d276e18dbd5e4bd07feec4ad73bfbcc84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USGC62001332.