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 0xa52ba4567c1569b2b02d5859dd9e8bab0b0f47aabf2a08452c2f1913f9ab27db. 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/035978cd-007b-4c53-a2f2-683d9acd3dde.json and https://artists.proofprofile.net/proofs/artist/035978cd-007b-4c53-a2f2-683d9acd3dde.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 0xfe2947e9244a141c8a7da662cde17b96b18c6b688033b68beab95ad90f073bbf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:10Z), 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/QZK6N2276136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe251b530ac531d6ae47d20b1a0061157353043f97fafe550d1617e283e5c8cfb. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZNWQ2299396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a322c26b5d660dfa2f40620ff9de392e13b13358bd33fdf959dcb401215737c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES92315347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9cd7948d815cb481cc4dbf556530a4e0297e5b4cd535d354ed85788612fe10. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZMEQ2330567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dda707cbd0151d3f56f14326bd55670bcffc25db5b4b8813492c3da433c67a. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZMEQ2330571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64164e07437d5f181547301810c0f57b07f530603e4aa6ad5692568b8cad420. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEQ2359311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f5424fdd2cca061205f961c02eec9d98a874495f43538e04f7400783ddb178. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZS7J2344683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3387206e85e32f1063d5608486a21765fb1362318b71de59d7cb270a2b4930d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZS7J2315351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ca67a6a5a43be19ddd1f272a525dbc8764e86e35b006caf86e17b78aebd3b4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFE2341981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa135805f862b625a3bbec3c8a1faceac1672ea9568fc0f8c2381b065fe84cc41. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZPEW2498354.