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 0x795dddc0c0afe7eefdf109bc934d9a4b276ab6aa9308b041977bf4306441a9ce. 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/2b652eac-c6db-4a9a-8d4f-0a2e5e167211.json and https://artists.proofprofile.net/proofs/artist/2b652eac-c6db-4a9a-8d4f-0a2e5e167211.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 0x6106803184bdb3a2a0e0f8f6f6b65f00949ca47c6c72eece7195584dcb8f9c3b. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/USHM81247419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90743e8f9c01a71e9d0a82b09ccf326c4699ce0041d140389c6bbee74735343d. 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/USHM81247421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd18663f178061e45c4f8427f80d61bb4089d888a2bb2cdef7512072f634b59. 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/USHM81247422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea907417a81f1f89a325ebb66d2c7c73584207d01d870e90900bad81ca12962. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/USHM81247424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a12239235c76af2dd909562dcb4799c805b17c9d089d717f6b46412d47821f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM81247425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2cce8b009731141d187aa5b316b719018994a1fb1b369d4fb740bd4b9ad462. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHM91284996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675bd7aae98b6a1f8de635fb07b210700f8299d0c262802187bd77697ae4d834. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM91284997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea5e3a7b3b81720a6279b5d1406d93c2c320f147ecd103bee8f02ba33451635. 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/USHM91284998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4d02e52bbbba2b1eb09ba854de0592f0f7fd8d286b2f0704fea1dcaa76ac0a. 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/US6R21443735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8808d2e5e0b2d4b24cdc732c7856c70c3f938fe89062ac145ddf55f3d3b5d3. 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/US6R21443737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb283ade6d95e6cc9226c35a04fb317638be64b2eaef0a90e5bc68104e9e378. 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/US6R21443738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16662dbc001d895f53fb0d06c2e5602374563af9f5bc0e060658423022e3f3b6. 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/US6R21443739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3fa43c53b2394dc6fd1ab0c227d110b32eab7955a18cf2797d6e75be163da1. 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/US6R21443742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aff003c470e1765c6e97f4e95dd12e3b601d7a6316d9143e46c1e228f9667c. 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/US6R21443743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2643953f835733f8d5eaced27664385ea680af77a465123bc6b674044f2ce41d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US6R21443744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d416b2b244d89d9bc0c76293be5794632e97835695a514041db7e9fb8fe388. 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/US6R21443745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe091a63ad02b8c0ceff9059d872a15bbb3ac207af5a8fcaebe8887da4508793c. 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/US6R21443746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b153cda57773a84fa761fadac95f6a0be7d4bc09473aab8b52632d235faf363. 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/QZ2NM1600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111976edd03f4a7aa56fd4af28161b7347caf3612e3cc772f3784e71a9ffb1ce. 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/QZ2NM1600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593226f9401529971fe290e028d8f447df6cdf2086c63937298180bea4d92669. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZ2NM1600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7610607f73aa99e3dc400368d0bd7074731045dbf26b7ae854f87c6d6db82bd. 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/QZ2NM1600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dd5d2d1cc20a9aee8a6bac1a7c06dad06dbc90ab3af8c7179b8df39abab506. 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/QZ2NM1600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340aed9ea03a03fde908e346654a3e3582b0a2c3877649daedc72211e9b8dffe. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZ2NM1600077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83eef9e11c511f93f10ccd6b357f0a4816c501236aaa0abce9d800e17aca9b98. 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/QZ2NM1600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90563b4dbb963ec7f313d4a133fa0d667cc5d65a44ba599fd4229f9e20a9e6d. 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/QZ2NM1600080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39c65d27bb1c4ef1ffcf6b513f7740e2c23b4d388b9fd8339b65e69ca8e7d58. 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/QZ2NM1600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6911eedf9c3d80c4b3665e097a31fdea51ed4301bbed1c2f95f2f35852b4f1c1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZ3AK2000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e64b8a68e16e210dac20d4c6849829fc6c7c4e596e9fecc8dd19f874332e3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM24S2205270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b57ca8c937a1eb36dcabb1aa6da9f398442406b833ea6e39c906bc7f5f298b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZ3AK2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28e5f88f26a31c3b83174daf233c321fd20b9b0c452c2b4dbb1ed1cec9d1322. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZ3AK2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f5e6972b6c584119f79496592f70507cb6c46cb22716e6a42754bb140d4afd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ3AK2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7384793281e6f179fe7a88d3de3bb3baa65132a7d0b28e61dd8a77b7eb3e39c1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZ3AK2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f24fe702e14cb6d001b5127b9ae2e78a275bed82cdadf2264ee18c5b204f464. 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/QZ3AK2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00631d284d378e0775ba3a67bc4fff1f6767109a427a86d2e00a158c10df0c8e. 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/QZ3AK2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3381d48148e78de58936382d504733937543688db62577b0214e0ebeed6c0c6e. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZ3AK2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ad78d97c59122a0df2c3ee7c0ee070c2662bbf62901557000ce0b2e7792921. 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/QZ3AK2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375b96e8872d2a64e6b28634f45f219d8dc1277d51fa6fcb2d6e97865bc2690c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZ3AK2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4795acfcadeae54142c2b9e20a5f2d3825672fad6c11c8d4e3f3ebb707e603. 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/QZ3AK2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b91565212918f65d70fa8f7249ae96fda86d4b3e0f7d1a3f8e0027af3139d8d. 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/TCAHM2327204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e2e2f2312ee1f1790dfd26340702c135df8538fc9dde741196be7c3d63c63a. 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/QZ2NM1600035.