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 0xae1f55ac55918fd53f82fb82c4784a921a3c6b691eefbe267d6d35ca1144a750. 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/269f2242-7378-44aa-b9cd-b9a9c6630f2c.json and https://artists.proofprofile.net/proofs/artist/269f2242-7378-44aa-b9cd-b9a9c6630f2c.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 0x86658b221a40f51f95c83071181f0256d0465fcc5d9fe60173feb608b02275ac. 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/USHM91467021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4dd27b6f12601ec3465b4198c9406a4c6e00138911998f4bf2e6d9e52ecd65. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USHM91467025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa262c08c6698e7ae6ca0e33292cd95cea7f4d628ec09c27e8baa35233d93353a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/AULPJ1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a492a2e2e7b5ee57a30450714b8b4fba4519ee6eb4c67eb42462c8a5382c969. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AULPJ1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b5dbf547d55ac1813a9b2a9f18054d0616b79ec39bd2f288ad588124c734f9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AULPJ1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cf9283864739d5826990120cc5dacc9e42add98e49598e2fca56e537953e4b. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/AULPJ1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3b42f819c14af0c84388ece73d4b431e05b1f916b35630d04a56b19029ad45. 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/AULPJ1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa262c08c6698e7ae6ca0e33292cd95cea7f4d628ec09c27e8baa35233d93353a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/AULPJ1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b5dbf547d55ac1813a9b2a9f18054d0616b79ec39bd2f288ad588124c734f9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/AULPJ1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cf9283864739d5826990120cc5dacc9e42add98e49598e2fca56e537953e4b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AULPJ1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1a419bbb78ab50a596e3dacf19ddfabf5dc77843c937dd431ebd9aade534b0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/AULPJ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47ee06586b724c6c03e7b49e274fb73c2b5fe879d549ef545d0d64be40d54e2. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/AULPJ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1a419bbb78ab50a596e3dacf19ddfabf5dc77843c937dd431ebd9aade534b0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AULPJ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47ee06586b724c6c03e7b49e274fb73c2b5fe879d549ef545d0d64be40d54e2. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/AULPJ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fec24663cf66f1aa116fb231e10435cf84a972fc271b69f0c2b7a8fff598687. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/AULPJ2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1baaed24ee345b7b6c946e569e935f25a64f19c69fbcec93ae011e7c66a4d4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AULPJ2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14276d46c4b2d92ae869d5e813010ed4247db8cab398429e6e84f80c96c7f52. 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/AULPJ2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d075610cfb1cfa8ccc1f477590c7e08ae7e52160c926f1108d375d539b5101. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZMEQ2268025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73e151e19df99255cbf1f325c862734318588c924461649b955f0ee7f52f487. 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/QZNWW2228989.