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 0xb80731a6e1c7b18d036c8d862d1374b4ee6987bdf7aa533ff87f491cebaa1be9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99703336-b7d8-4cec-bb8a-9f4e9d998230.json and https://artists.proofprofile.net/proofs/artist/99703336-b7d8-4cec-bb8a-9f4e9d998230.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 0x4aca877c5f0c825a37ff31f74c9147652540278bfcf5a517d03688bca2509ce7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES71G2012818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee0dbd393f617f790727ae96c1089f64dc0fb8e28fa8d28df8fa6f739681bb4. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/ES71G2021150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b1bc994ea042098b40106b7b25a6aa314adb1f13b99dd4e24e44055730303. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/ES71G2020576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431b27e5a367c334be50d01f259868fdae77c275992e08941b6c5f918e82ddfb. 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/ES71G2021132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a71013a2270766c309a6fa3d25493d6cb4fc2bbb181b65f62d67d6783a71b10. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:52:06Z), 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/ES71G2021133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7b9c71fe860677b91e089a2b1c84796db94dc9dbe2b0ab0e8b1d61501f8fcb. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/ES71G2021134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e6c262f939130be1ffb4ebd8386cbb5a35da0cb582690570d573ccb16e0b46. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:15:17Z), 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/ES79E2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d68a125ae4588d116ece384ebdc23deb5cb5ea08b3cff3452acf68259ee1ff2. 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/ES79E2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5ff64872b568e39b5f938bf05d691c6d703cf41bef218d3f7d9e73a76b6d1d. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/ES79E2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab72d2c3adca851bf480ab62b61307f964b6db7dc29569613d16cc890aa798b. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/ES79E2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb4181422f6158198ae1edc2b3f55350449cb48622557a94967c240b8985ed1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES79E2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0f880748ab32c4fa3e0e2aaf8e5269ccd6b3ae8a2b1934ea1bcde6783d13f2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:49:04Z), 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/ES79E2300031.