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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 0x60f36605da2350d8b9200050447605433ca663f6b477a392def72ab3e5116fc4. 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/d7a80928-bcd9-4263-aaf1-5c93af212c56.json and https://artists.proofprofile.net/proofs/artist/d7a80928-bcd9-4263-aaf1-5c93af212c56.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 0x75d53fb177da84e15e4f20f07ab1e54ea9f3fb2d288f19f742e1d89877a398db. 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/DKADG2000503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5677718338b327c902cacfe9e7fc25be289bff67eb1fd2ae437a4dd9277542. 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/DKADG2000515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c90946bffc767fc5dde90e99713f5052e6873c9b08c9b4859c8a49ff4a80b2f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DKADG2000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9370657f0f0ee317fe8ae25804d8de94ff9fff22962ff7ca3284e92215604d52. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DKADG2000535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b8eef51d33da3cc657ece0594c0fe00d216703c3f92d323596f2c2e13794a0. 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/DKADG2000536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20b79336a79a3e1740d74f1727efadfe05c4c05c949ab7ca4b858a4d7ba5cb1. 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/DKADG2000505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55edbb90e62b8624abc15b691d7a28b3255a3c12b5104dd1a1993770faf6e1bb. 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/DKADG2000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb23cc3e133f5f0b6698d5fbe1090391d93acf22733ae56fefcdb44ecfca6aa3. 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/USA2P2206797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f161faa7f8bec21f6ee6a795406782cf7f102ae1ba100cc9a62dd7c5bf07247. 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/USA2P2228138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa546ee779465df038d89ad0f456e995d53ee4a71f1c8441c9a91de09b80a5741. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:20:03Z), 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/USA2P2226096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fd497754eb1fa4f967a9c4e945de72d817a48d1a2928cdb6b01fc427ebdb5d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:56:40Z), 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/USA2P2228124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b6ab1f3829a725d90c3c3f023f8724be05fbead2aeedcfd10d692f3606ef16. 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/USA2P2228144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca0cf920b7a56ff0dd553e3c6320d1738087288a65c2af11eec9e9754681de1. 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/USA2P2228047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102363f647a6509dd3fa163d3578b1db9cce41d5221265a72dd6c62faf2a727e. 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/QMBZ92062520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf958be1479c346ef4007a5befa402b285fb8b0828243de34069577c92a715817. 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/QMFME2058674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc944e7bacda7da9f66fa203189a84fc68dea86b44dc926a88cd44b126e73549f. 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/QMFME2058695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39731f34eb8c4a4659283c4341597957befc7ec11d258f3fe7767a8d5cb3f92c. 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/DKADG2000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f5065a9b50fc25a78ca4670b69141c17999605fc81fc3c2e90765f21777e4c. 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/QM4TW2250659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde9776b4c9363d205f2d998ef4a048d40193c4ca739bce682d7acc46f5f6378. 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/DK92A1303303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4b24c006daa46fe157f1c1a1d25b9e3ea483f76b5c547f1d9bf676d88c7945. 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/DK92A1303305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d885d9e20c4c9e8ea2920078b1fa8bced6232d2e3f3c36dc1e835950b2be63. 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/DK92A1303306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8752dd97b774b0cec958a3554464e4ee34de6e01fa8e5932f9e6b91c4f6370ca. 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/DK92A1303311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc5c2bdfc0d1e5de6884b75432d4c4b42b9f1b863333d0ef7359dc0c24cda2c. 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/DK5U42402101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4e44923720b73b10d42739b0d4e243895d076f6f8d1a472d5654914fa0f082. 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/QM6N22474443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc77b8024eb2469b0c065e86da8ee3908e7c5c7c50c24c6a83eca5be6cc4859. 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/DKADG2001045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f72173f21a9cfd66ab78678a7f5439ec19116a0a44fe7bd77ec481fe3a8a1d2. 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/DKADG2000370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49db4e67d2a1f0d0dfd653dbaa1b4ff75f55866f538c80ba108777a5684cadff. 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/DKADG1900596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f0c5737ee09816803ded4c060c5d28d777fa08fe559588e655039ceac721f8. 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/DKADG1900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3158ab3a2f6eaf78f9da566aaa4b501fd331e83548fa3816f2a105a6c2e58999. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DKADG1800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7674312c44a01a7d9710c76d4a8e1c6065c974d783896b13930d5aea716a6527. 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/DKADG1800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856e311ac818157391cebeedb8ac34b0d4c0003e368cdb556cbc461258a5ca8b. 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/DKADG1800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c5f5100ccb9bc91f631096c3fd7b08631a662d5559789ce13e86da0cb55893. 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/DKCC21601801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a80b68aa8cd4776140181ef57a604a3c9a91bef15bbc462494a7d4488b8037. 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/DK92A1500602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d312e236e5c269a6a1c2a4b2790ab8950c047d5a3a75838783cabcfeb8d11a. 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/DKADG1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051efe6b2db7b2c137c23acf224c86848b6f6991b9406089d4dd8150d63cce8d. 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/DKMM11801101.