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 0x24ef5ce0307554bc6189adea9a5fa98a9bcbf33061c324f55a187f716cc4e8f1. 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/ec9b92b4-795c-4a48-9eb5-79c1ee4c4639.json and https://artists.proofprofile.net/proofs/artist/ec9b92b4-795c-4a48-9eb5-79c1ee4c4639.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 0xe2eed5a43155bc109f5122d32f0089220e09bfb5ed8dbacd6023dbc44c7cf946. 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/DGA062455467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ae598f06fe73cc52b6c65b709c811d173b7510bdcf8948584b565df6f23092. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USANG2456707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2576954405f740ab6e6470f504c790fe4af8ad7c244ec09111c03526cd0dc9. 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/DEH742434966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c791f31ddebe57e093bbc06c2bf50405f7169fdb96298adf8a540da9bef5be. 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/DEZC62458055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd61d89e991fd122adae60245f04715e4443134d4ba5547beae7a1c8c14dc99. 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/QZZ762469546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4c63bb767bfedf4bd32ad4b49ddaf5e443ef1c4915f02cfda37f120782575a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DGA0R2492402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5bb539fd35174ede43816413e83d07f430c1a4e00570291c2bb6f166dc4f31. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DGA0R2467932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6aac2d58efa11c6b51035731e28758d8ce15ba656985be92c9262374de9aa08. 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/DEZC62464654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb08f37ef8424391d24f2028f4e9028fe41403211c314cb0df19d6226581a950. 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/QM3DF2417679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d16f9627507ffee150b5a3eae44a6c2813be2c96bb8c1caddc534975d05028. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEZC62469953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70861cfb4066fb7c49993c2096eb2417adeeb746754e2397b982b47cef8f42f9. 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/QZFZ72584024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae22da964e4964eceec5559698589385908d970e00fdc7da4d0de947afd1072. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZES52567777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5fb6272df86b68c247b703c76d33f7f8ce6830cd24d31ee1899a4cb7c80590. 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/DEZC62575128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ab7e23c4b5305326d6da58182c69e57c09d7dcec7a646a04602085fcf84533. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEZC62582534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa350e46c3adedf777a956199bfff683f46f5bc7d0be8826c936e2d521373551. 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/DEZC62586470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb1549abd9b21201e69d6bd1d0003609149a3ae2c45b00016a94487cb99ea6. 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/QZTAS2561256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782e0f0f6f7008c75ab2180dc72ac3ab09d6bf3e1a56d1d79159d9c2e74cc3d1. 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/QZTB22550739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cd25644ede6f50ec00d6ab0db66844740694463e6544e663d1b25408e749d2. 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/DEZC62598945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9c91077847122ceb73c1226c3ff4813547450c762a5e2a68bc3483b862ab9a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/DEZC62503366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6ce5a277c566249226f494ad96e120b605bb2b9b926acff71ce21193d3cbbc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFJ2552267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e269b5a5189bf78dc692e3288c7e802389beae9a9077f53a16f378c4eeba8cc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/US3DF2599930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0aab16e15e26a562771689bf1945c3f65c7bc687ee1ff8bfc6257adbe7f343. 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/USANG2503059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea8745982ccb6e62b1d8deeb35616bcd9568cb67defdc93eb1e059046b26aa0. 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/USANG2517262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ab999b4f95bc0a1b06131c5f029c5207fa03f8e454c4a9535acc9bd221986e. 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/DGA052539655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d38f1259572d776a1978fae14919d626b1b9b8fa41e4360f2fe5b6315675d95. 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/DEZC62517003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ea322871406045aed38bf43f893ef3a403f78958d0b2aac6c308d48aa25ac2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USANG2532701.