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 0xf939cbc6d28ddefe5e0947b5ab6d914c4f62f12c9518e5e89b0b9827a282a87e. 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/dc3c01fb-9ddd-45ba-9c1b-e6840f8b161b.json and https://artists.proofprofile.net/proofs/artist/dc3c01fb-9ddd-45ba-9c1b-e6840f8b161b.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 0x05c1e7be1e4d2fda3f8dfc932a0e3f527186bd668bbf772a89c784fd02e07553. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/TCJPC2495511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1dec8c8494afa3aad7f26f6c7e5ac1eca607be2923148b5358db6c005b6c6f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCJPC2495512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c47f48a2033c91ec20957deb6b15d3785c8312da1a18dde43a3d0540b3cf767. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPC2495514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1e8c24e7a21cfb595b8ac807f584555a09e0897bfc9f8813476f892ed58388. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPC2495516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72b57ef17f6ac7019ec25d4ceca06adf4e8481bb9b324e01af266d015ac5716. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:03Z), 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/TCJPC2495518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65070af444c9e7136aa8f2350545893cffc6729072da34371b4881fc5373853. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCJPC2495527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b7a8c6e5c9716271a8ea8af0b4bcff5a09f901aa8088406347abede185a25b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:53:23Z), 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/TCJPC2495528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1dec8c8494afa3aad7f26f6c7e5ac1eca607be2923148b5358db6c005b6c6f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCJPC2495512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c47f48a2033c91ec20957deb6b15d3785c8312da1a18dde43a3d0540b3cf767. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:29:11Z), 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/TCJPC2495514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1e8c24e7a21cfb595b8ac807f584555a09e0897bfc9f8813476f892ed58388. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCJPC2495516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65070af444c9e7136aa8f2350545893cffc6729072da34371b4881fc5373853. 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/TCJPC2495527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b7a8c6e5c9716271a8ea8af0b4bcff5a09f901aa8088406347abede185a25b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPC2495528.