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 0x7b4b314bbe1db6b3b1fcb3bf7395fe4aff19a2e0e19127df5022d16269cddc22. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a86f3d47-572d-40b1-a5bb-86aef7b561c5.json and https://artists.proofprofile.net/proofs/artist/a86f3d47-572d-40b1-a5bb-86aef7b561c5.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 0xce75751b958a93cfbb2fae19f95381bfd17a71346d64f6e6143c7c26800b1e3d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:50:12Z), 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/ZA56E2305423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7625fc706524c8c982b885e6f022d66be826f5f5940c068f357867bf9eacdf68. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZES62475999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43d21c1c9664d30621a2639e4d325c966d41e8ec8a1810e967c23c02fe4ab4c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTAU2460686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acff60a68330fd16889898f5a49a865065bb78f6a5ca2205a09bc97399e0d73. 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/QZTAU2460687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf6c4cefab0c69a5d54605ee85c65be81bff1af20af98db1e2f6ddc953351dd. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZWFF2432104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d0c75474e66687e5113394157f56aa66b2b47e27cad8a25292ea79922cc136. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:31:08Z), 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/QZWFX2497480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9909b4417bec714b54079a00270a499f800ece7463732af2b4cb15ea90cf5d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:05:53Z), 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/QZZ7U2449819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306f547eb162c017325d1f16d6a004a5887d066de315e4cbbcc12c79bf734c61. 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/QZNJZ2591828.