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 0x6bcbb688a52aaef0d55ef93742d642ba8f4a139990a1547dab67c9b54e0a33a6. 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/03f4c666-1e0e-4c96-97c7-768707c634ad.json and https://artists.proofprofile.net/proofs/artist/03f4c666-1e0e-4c96-97c7-768707c634ad.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 0xdd05969515823e2dc1e5d5875a7bb67c4b4358339e1b03a0cfe1404d41b1368a. 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/USA2P2412990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8bb0e5cf97129564d580bcc2c17120ae6e5e6dbbf4ba0aa7dbbbde9101148e. 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/CA6D22300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaff3ba5971d63592696a0c62c288f55e380e4a769eb5e5b926dbb0bba9fd4c8. 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/QZDA42350798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55cd48f023d001676f4f9f9e6bfb2376fcebdb87c081a7bc62c05b1ce437213. 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/CA5KR2325399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9ae69c9959e8334d8f0660c5f4bbdaafe57862014ad433bfeeb84f26d20321. 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/USA2P2309814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c8abe841bac9f289b3768229ab5d4c08c761ef4c1b1585fd4c747f960d34f4. 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/CA5KR2294568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2b30ac85d6deaeff1e738298912e262bcab5c9f212f8518cdc8cc30301a518. 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/CAUM82200314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e7a66335d06e6a433b39e23c19f8e240ff6bc4f694358fc1e7dd7db99c1525. 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/CA5KR2258040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a29e527ad8354a1d58ceed88305d46a4b207bdc1ad810ef437b2a7df251de36. 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/FRS182101395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04afdb723dbe89a1803e5342d8f0f20e0f9c95ae2ad97977f295fd5efdc7fb0d. 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/QZS662115998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0343a8854c07b23a64afe49c2dc7279a32fb95867730a179da697c5206f6e735. 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/QMFME2159105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64334ada761671c9c7ae816c82ddb07d5543668382d82dc46e00f150ccf9a06. 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/QMUY42100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e7d3e6d111b3a21def6b7c84359d7d3d210de3b8a1da647ff5b926e5a6a00a. 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/QZES82126607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd3fef285bbecaf20abd2bf539c07bb2f015d7651071244b1bbd27047990605. 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/QMUY42100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda87a58a2fd076b3516b0c10b1363a161b15f9c86c2d52ac171401bd1badb01f. 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/QZNWW2000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb6e60402818f4b6a248ed7ea245846553ca88135c6fee431af29fa7fa41062. 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/CA5KR2107554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353965f6f24b46998c5c7c2bd26d733a08a1edc8dc6333a145f03bd4d530fbef. 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/US3DF2089531.