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 0x95f9d5aed508e8183a73df9526d1d170fe0528943e242413e8ac3a986faff70c. 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/8046ed31-5139-4872-b54b-e1df1bbbfed7.json and https://artists.proofprofile.net/proofs/artist/8046ed31-5139-4872-b54b-e1df1bbbfed7.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 0xce75a916e53704507ee02c0bf761c1da1e83e8e8604b02ec63d2b79863c7dce6. 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/FR96X2166162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaae3cdd7824d34665702e74452a264f6651de70194c6c3d655592ac9fe3321. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/FR2X42200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a1360bb08de17a8ccd8e04bfb1a74eae7b6de26a5c537544964b64720d49c6. 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/DGA072383728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357471f6420b571bd33c07d517038cb1b5845e02a20a6662ebe01ae46478d085. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/INUM72500273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d7d91a2a00f0dd1d1896a1de747a2a87d0f9c5f4c52fdd15f8aa48681b9cdb. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/INUM72500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c972f47edb598e1686f8f47587d1dbf635d60cff8ae902ea1d76e9622b5e53. 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/INUM72500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a93f2e2ead36ba90f8353b88f706cecbd661aa76cd0f3a92d6a523144139a. 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/INUM72500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc38f7b225fea810f27105a005dc00c8cc5171161d61c78ec957aae3008f623. 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/INUM72500413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e04906a98dd536ba1e70418d4126c954ac1799bb81fb2aa010ab937b313669. 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/INUM72500414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9b0f1722d6c12644802e452b7effd7f26d83546c24da0f35b69d4479b32acb. 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/INUM72500415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bcf1bb3861ea5e0d2d4fd19ec26c63f572f49d96951ab96b802597249676c2. 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/INUM72500416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8cdd1ea30f72f843ba0e140a74870329b31c0d6f056d896c448c5067b06e0b. 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/INUM72500417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c0bc87dfca485e094f233f284da247e74971c238a03591f5f43f8447253627. 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/INUM72500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d95902c70dc8437fff556fc1b3e6505d7c28d96acdf62c271e8bd240ded6925. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/INUM72500724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8f323d3f81d249079285a386a69350d0af2eb32d5435c8a79f837e1507f306. 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/INUM72500726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b63c2ab8d152951f8186946016f53c5c59b363e98ab2505f2913b6526114d2d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAGM2207891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9747b111c5093b185ea4449917e960aa20938b718b50c7a08ae23973c12c8c62. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS172316530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f22bd3e21975a7dd3c11dd4829229a687e737e096ade177a214afdec9f0065d. 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/INS182303050.