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 0x85e28478333c56b18578e4590274968c104a8d8ad099723786d8e64a0aad6cf7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcf4b684-7da6-4b0f-8bbe-996c6b180656.json and https://artists.proofprofile.net/proofs/artist/dcf4b684-7da6-4b0f-8bbe-996c6b180656.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 0x6efd8cf293e630308c3eae793d687f9e9ae8198d478744df1a0574c76405db61. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHZ42002550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa637ce4e6720ba4a12fa19102b96ede289f0e498ee9da96a3b09f9fc9bdd361. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:02Z), 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/QZHZ42002551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bac18282774c0f7c07c44fc920090d1fe35f57b117469e79d4efd2dbd07316c. 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/QZHZ42002552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e9ac78279ef3dae50bc4547d568d03b709c052dd10fe3117487ed14bd61b13. 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/QZHZ42002554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1438a9106ed7c01230ac50df6a15e3e8b39e0e342abdb6baf8d66eee3c715dbd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHZ42002557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9ecf55b36780047967701355685fa6c427d80494a57a96e79a5c6cc4f2adbb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ42002559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b345ef07f1fab4d4ba25b4f55fc20b21b485b4888641721c8b610becbf134a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:25Z), 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/QZHZ42002560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bdf1840a523fafd3656c932cad3b48859f2e0e00fdea3bd3aede63fc0af611. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZHZ42002561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3289bbd28ab444ff44e7d72a485fd3c3ff8896834b5721cb2d90477c818ce670. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:36:02Z), 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/QZHZ42002563.