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 0x4a40f89b9d22c5b7d4d0ac2a5e7848c482af0445225cd5a5257452ce2ca9d922. 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/f789787c-d48d-4a49-8cc9-7829a9ba6cf8.json and https://artists.proofprofile.net/proofs/artist/f789787c-d48d-4a49-8cc9-7829a9ba6cf8.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 0x2d02b35a7db171301dd5f0271c929530eb5df1e8ead3107d6f4cb72d820338d8. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USHM92001467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646b2fd621155d88bd88d328d83a74351a325730b92ae67b945a9c3676358245. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM92001470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615e0bbc6067805d9b173a940bd3d0c436101f8ff1191392df1c51970065cded. 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/USHM92001472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0352983f0e872037a767a87302d36385d714bee796f703e1ae7c0a4078249385. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM92079726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c63e5d6862273cba869ec602ecad8f798e435729c73bbd0f25e0e800b348d5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USHM92079727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945770a7de5993a615efd25009cbfd6b3fa37a0f994b440ad2a1b5eb492e4736. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM92079729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8317c986bf100aec4351da561b5a6923bef8fa91af7b8fb17663105a96433. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM92079731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed0af4e340e393c1507554623bf7b5c0db4e635d1374e2b2b03e36bcb0c9a6e. 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/USHM92079734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891718df305eecea2b491459c6c5f4bfe9f9e7866e0ad7efefbedeca031e3e54. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM92001519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a83bec6a8defe94b34388c2857370a43fe2e796dcdd23991df74265780cc02. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USHM92001520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf8f0568aa804a0176a520806316a34d03ba362a50429222b8e2115ff3639bd. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USHM92001521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1391bac97975ad0932e3c069e4c66593732a264a91db6345022d7a6d6eca3d65. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM92001524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b18316555ff41486c6e1c5d6bf244406263802e1768a6355782d17f7cfc41c8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM92079693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9a27049d538e36d36255661752167f7a441f6ff11218a3ec32d13d0077c005. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM92079695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95465e358cf5525fde93742b92b3282ef4dd43a54487d47eee1890a4a0b8a4fe. 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/USHM92079699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297a4576bcc0192b504ec8f27c90695f157aff040c85db076d6c5cbd545d3c57. 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/USHM92079700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa092cdd04e89eb21c51f6068120bcb56970ed56d1b24d7575d4b6068e56592. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USHM92079702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d1f28ba160bef76cfb2496e8f00ad854c341c778515c9808da0bf1cf57d3f3. 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/USHM92001599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b654c9447287ce931d589d3e76b739cdeab27069f713d3c9d28b518b477c36. 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/USHM92001601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38af408dd279afcc06ca58d4a6b9ee558a956c9842a3fd6a7083266b0d274b23. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USHM92001605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e518a853a821b7b7df4ccda0598e95d6720475e73b5d1012f30e86a56046b6. 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/USHM92001606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617b8d30bc9c097c94c9612ed24935afb8ef045da240211c01ec767665ad35b3. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USHM92001607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07df8a90e5dd42fa56e6672bfc7fc75fed6c47744915f1f9bcab1fe1604410bc. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USHM92001608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814d87e10a4122d29041e0c27dd797e13d68a61dee295f9a839ec8fe0a6d722b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USHM92001610.