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 0xb783f477af54059779d0caf38b4325e21a64880809d2e30399923ce62ba4d15f. 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/f6a9856a-84eb-4c98-89ef-95439bce993b.json and https://artists.proofprofile.net/proofs/artist/f6a9856a-84eb-4c98-89ef-95439bce993b.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 0xc666a7824a302257731f2d5ced26ff59920d51990cfe80f058bf07731c0eb326. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QM4DW1862908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8195b377a0ee0472e75c435ca47e8ccb79974424353c0e42f7e8ac4a7b12e59e. 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/QM4DW1862916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6716e04071815a5e954d8420e54ee5c59afd55cd4015ec3811b4c98bea9ede89. 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/QM4DW1862918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ce91e34464c8a7a5f704cdd50a19ddb3a450c9b3018561065099efbecd852d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH1891637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2d8116e470ce4b8fd88a1280d01f86a0e67d3fb26f6923e739f3c4dc145c9f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USCGH1891640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e87d39aca30dd8e6d28b343753bee37284a9b70cfb6bd9fa5031730cec1b41. 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/USCGH1891641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489256f74b85514c869b00bdff4b87500642e3d7c4ba1005cfb2d22129a749c7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USCGH1891642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1936cbb71b0b3376ac58b1f115f59458b5b3bf24b92d16e08162365872977a2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USCGH1891643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bbd6eea70a9ee2a69ebbf0f551ff24eb17c7090243db1f31f90032353a0946. 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/USCGH1891645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354ed9b365f7e06d7ad9f9aa21455500ecb45f064a3ee1c6dcffd45f0a940378. 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/USCGH1891646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318ee7fbbe39cf27c5c2e77dcfca406dbe0134970a9c051fe4589e3d91b6d970. 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/QM4DW1892272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6ced5a8aba5f9230a696927c1bd673f87f9e597b286fb83e7ec82397471a5f. 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/QM4DW1892275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaa6a764b87d0451f0a4e62d7caf729702b2d3460bb9e91ba32efef8118adee. 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/QM4DW1892276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e2ff06bb89be1e458b2b036445c77df516bd413cdf9b56c5ef1220876ad93b. 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/QM4DW1892280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f72f30a773a25f68ddf604ac3d6ce1742f7103f6960880fa789a14e0baaae. 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/QM4DW1892281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ba3b8d453469a4630f09ec914b4cb689e5ce0dcf6066917feb0221f21030cc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QM4DW1892282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3312b2ae153c621b02237e414c3863c363c3ac33142244b82d31f086fdc31981. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDQH1805630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1debe2211c81279d05e86108dc2b7e60e8a7bfabf58d6eb99c39dba6e848e1cb. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZDQH1805631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346b868c1edd8190001b5f58d75a4458d88de98f15d729682c6eca0ac66b8706. 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/QZDQH1805632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a7737a011447f70de1fe753484fbf8ad40b562f4724cd0c8d95411915c84c2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZDQH1805633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8c91372251c1deef5f78e1baacdba24cd3a12d528cc4f343a1776182b29581. 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/QZDQH1805635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654565dd2238af1c9df7ec375ffa9657dbd39c7e40adfac79869d7438cb819de. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZDQH1805637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe59042b6ddb715d3db2e9164d76424dae919817381757f1e7ba376ccd5504e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZDQH1806095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f13971daeb07ae2b87e8a5668dd0e6b7c0aeaca74b12d0f38d4b043ae258bd8. 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/QZDQH1806096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5173e4c55221e5c2a5d62880073bb6c31d6d285317a8401c500f1205af930106. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDQH1806097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a2d47752f137997c1f9333d16f242d220f3c493a24981436b2138e435b392a. 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/QZDQH1806098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe966aee8347d95aae530ecf8c4a63c617ca39ffd26bc44671d658b3653d8e5fc. 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/QZDQH1806099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b996f24dbb911e86494c318ee9c2650ad65922bdde2468a9c506cd41f0165b7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDQH1806102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd625d3c39f42a2b66625a0506962be22aa0122b31e8b26b724fdecc4ff6ee9. 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/QZDQH1806104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37574a3e0d790f687d494b9d15aba71c5794f7efae413220b9543b59a19e336f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDQH1806438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bffbdc829cc37c34156a42ab9da32d592a5f003ced8cc3f70bcb51a1f8c3359. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZDQH1806439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee840aef2afe6ae5d1e7d7b8bb1e86817fd141b04c189fcd630e19b75f091a9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDQH1806454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b4b5fe9cd23dccbfdff58a4d3c661412c2edc3295ab54832defb54eeb19830. 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/QZDQH1806458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d62af705c3788d271c2c63d2a1a214a3517c2ace7d26e6be2f223063805ae4c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDQH2203583.
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