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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963d0a1170d1768e2a1fd2967c197c90e4f88b45291adf3fbff233b2317709fe. 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/9baa9087-7d37-4eeb-9fb9-5fd1badee258.json and https://artists.proofprofile.net/proofs/artist/9baa9087-7d37-4eeb-9fb9-5fd1badee258.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c4a8540cc0b91b971e6bfbc91693dc36f5ce3f5f6ece5320232329f2c88c55. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA62175469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc96f3a93f250db22919870c8eb2b873cbc8434afafe4381c4b145b9b6282369. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA72112211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb9d7f143cf80e8bfff6fdae119f82ba779178ca0f38d9227ab87fae2bd6f7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:45Z), 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/USLZJ2134640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6538db03e46726ca647ebe4c677433adaf0aa68e34a9a3ddf7fe41343425d432. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USLZJ2142596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a9c8fb79143c0213577ea752a35aa9c9f571bbf75739b9276b0a0884dbdbdb. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:45:31Z), 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/USLZJ2134653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf29256d9c70f2d369fb7e32431437f0af0741d2dd38398ce1de8a52cfa262e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USLZJ2147890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59dd80329f3d0366ffccb97866c53a9623d785534fc7a288ae9c097a6fe585d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLZJ2135239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb9d7f143cf80e8bfff6fdae119f82ba779178ca0f38d9227ab87fae2bd6f7. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:51:21Z), 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/USLZJ2134640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bbc1487583c1bd58987af7738b3d60ae754540c924bb8c47b258992417108f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:36:03Z), 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/GBWUL2212290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb811817ef01476c35e6dc4846dc95ecff8719d92755617cfd08a48aafb8e14d3. 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/GBWUL2212294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff449dc56f4e05fc06d37f24a787f5457d8758d422db1142836df02d30eaec5. 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/GBWUL2212286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9387bd51f6a59f269ac59d46721da38f7cef705e1949989c089850cf5515f729. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBWUL2212283.