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 0x7d708874113be45f19dcb08b23f43c9e51968e060e7e0097e56affcccb7fe597. 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/86188c06-d78d-44d6-9dd2-dd71accb92f2.json and https://artists.proofprofile.net/proofs/artist/86188c06-d78d-44d6-9dd2-dd71accb92f2.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 0x310065eb611bc07aa228ac4d76306031957c2ca19d579dd1cef7141d8fd8dea5. 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/NLRD52013645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf784a0069ae08dfa312a1c633c6d62d74ff70d301871c8dcc09b046942fb8f3c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52013647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a73aeea891789bee9785987e7cf9feb5ab858800abb6824f05be77ca462272. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52013646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb69bd3bf699cbb10bd558b7bf1b8998000d20264d8f1c1b560d7a2b3d1c7ef5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52013650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa784dfec24eea44ec77caea6295677a2fc92afac48e0bd39eb2e81822969495. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH742037902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb850644cbcd609f25cd4d51d6b263581799ac53c617b62458d2cd39aa6a47. 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/DEH742037903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ef82c5ccc1ca2b037b61021b2abe9eec86307f78c8b968a447f12f13066b33. 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/DEH742037904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c20365009b7a656d86e31463b8f70a4851d7fa5b24ed7386dbea237f676243. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:03:53Z), 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/DEH742037906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726ff6e7fd1eedd63ec8d27807c127fca154befa2d3927c454de18ed70df29d9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH742037907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5612760557d4025be3ef8bf5398df41cf28401f468d94937e68b4ac644a19076. 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/DEH741713520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a3b4be83465f27af4f1033d313d211783ee4e4dcbfcbce578041e92a59116d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH741713519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741945dc5e93275a7755ea9ab47e2e2a643c6a1fc15f0f0e11619dbae8069562. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH741713516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc8fa05ab6de7921dc29662c0939ebbf2f659b4d074679c9cb2fb483fc528ee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQY51783945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8389b959d43a1fa69fa605c7fc3cdb5fa91c4d7d4c8ae9238a53687a1334f3. 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/DEZL42300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a32f94f47f29c32e4511ba85d0ef054d84036b790a051a715cd9e8a8af9c550. 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/DEH741803475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e1810129846e18c2e5bfb1e1cff82ed44fe354918d7db3eeeff685f043c1b5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH741803476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97c60d488e8199f4b225905a9e29e57cd5070c81ed4af8d517067a22cd4227e. 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/DEH741803477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c2ee10e5530dc8f2858ba920133ac67d6ad7ada797400280a41f06f2e04fb1. 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/DEH741803478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8549162aad7a1964597ff7c44bb87495f27a0f846c14a0f1f5b28630c869a8bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH741803479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eafc96b78845baccc6a4cfa64813897aa21bece0bc0c3178a576cc283d4cb79. 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/DEH741651564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dbb30a098c18d243beac96feec3d1aa891b0f8ac793999d5c8c9a3b10b6d74. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH741651565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894b63875cc5dfb2c2ff1208199c23de3f6a9646d0a8285ebba0914ced5484d9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH741604097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3bb63cef886d6a2f23905f543ff6ec4c32ff52c0bffde25191ca66448bb03e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH741604093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633461d0c9ef1dd0a54eca6f4e014a9948d274a3e7c0ff75675992b3586c0f06. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:30:31Z), 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/DEH741604094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e52267c2583efd863bba9b1e91011658fabdd35f48a6c7fffa167b8e0c36ef9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH741604096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc07e30dd412d072a51e021cee3678049df04d6a71a6f78e9ff8a01d7fb28a2a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH741604092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2243670590f9912f1caf870f78d8f765052a0c296b8d5a5563cb0437614a12ff. 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/DEH741411202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cd51763a62ed224dc097f066a9590565bc66caf3dc11e63120fac12ca20c76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU1407383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a01c6341a9e3918839aac6c653afd80600ffcd4ee86f631a567e27f9c5a1c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU1407384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb2eddab1790ed70b74a3518de23a4c4598e8d19866aa0e8ccb7a66354d6b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH741310301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eba17b4858717bab371e17a2caae99a3b043c2f3070935bd397959d21f26c0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:16Z), 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/DEH741310300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7254024d0470f0eae1b7cd1e3767dc40ec49c0c030bfd9577a7d8df92aaab1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEL711310290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8209ccd2f070e86efec548a7ea87088ef1fc1c8044de065709a752429b8de63. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEL711310112.