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 0x1f0624da415d139410f21fcc8800615b4b79963ceb74d82a89052c5cc4b5585e. 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/590794dc-2d19-4f5f-8626-5b78ed5fa4f1.json and https://artists.proofprofile.net/proofs/artist/590794dc-2d19-4f5f-8626-5b78ed5fa4f1.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 0x51a34e70cfc5b5064dad714599962608f9756a57cbc6736d28007361baed3937. 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/SE62M2365005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57613e931da4a7e8877e76fbcbad1c9dc72af1942b49b0067e46c4e117d83887. 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/USA2P2454566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a573dfa5f1f6825eff82830a686de3f162438e43ac20cb55a1c088ebfc7dd9. 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/QM6MZ2509909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecf5d32a93ef513f6b446953f7e1e0725e002ce72711ba59581fa68fb014e6b. 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/QM6MZ2509886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217c4f52a43ee463c5d8dfee97762d57843aaa374d093e4be229daca75f5f43c. 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/QM6MZ2509900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70ca2eb6f0bbc051710c8d6c6f122141500e8a3706a2ff0da9b8a3fe8d73257. 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/QM6MZ2509903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a573dfa5f1f6825eff82830a686de3f162438e43ac20cb55a1c088ebfc7dd9. 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/QM6MZ2509909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0f731d031775161c289498ea77842fe6471d90c66d5eed55a8c5dc3b949b35. 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/QM6MZ2509914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf8f416bca2438d1275081d7330b9ffafd42723165de38da4240f1ec81ebf16. 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/QM6MZ2509919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9b354d1ca21171a6c398cd4f4bc12167db13d8b6827892ae4fceceecb285e6. 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/QM6MZ2509958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9b354d1ca21171a6c398cd4f4bc12167db13d8b6827892ae4fceceecb285e6. 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/QM6MZ2509958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4574729186a0b1b299e8ff8d069b91817bc424293027915b295dfca7dd8339. 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/TCAHT2486990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fc8380c1ac3623292969e1172ad6e0b1562cc27ccff09c49fd3f45da2dd647. 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/TCAGE2201760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ee0261fcefeb95abb1ead6675da1985d524444b094c9778b04a9fb14c53bc6. 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/TCAHT2499113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bfcc2451836979dd1b19d34ac4259698a37ce9b6fa6e911f1f1ac63d18d209. 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/TCAGE2252783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd1f607c1aa3a04eb8b55a2038548a9d92709a1a1b54ad83ad2fa01223f6395. 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/TCAHT2499197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf99e9ace3b777e4c3a9d1e4e5c27c484deddf84072429cd5081f734719fb2. 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/US39N2303201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbe9393dc874264b8c1fd408d0e2b903b3eee19a741d49bf878e79fa6e4c743. 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/ZZOPM2237161.