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 0x381b721911b9023d3eac91daf33c9561ee0e87816fbb150fa5df3481781f54e8. 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/af87729a-063d-4cc5-a40b-2fd9b46af8df.json and https://artists.proofprofile.net/proofs/artist/af87729a-063d-4cc5-a40b-2fd9b46af8df.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 0xb50a017e58c7484436f6c789a51bf0996170ea3ced50bac5c119059e06cb4420. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:18Z), 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/TCACB1454117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2f71086a36b69d3c3620b41f1442b40082819763b58a60a8e1dadec6a94ca4. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCACA1418658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07e550f58487662874872d815211cb12d65a76e345d82702cc00cd34fa26b64. 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/TCABW1403898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631a539ce92edac47cc8ecd991ec730626136632d1da76e2f4d509662441ac3c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCABW1403903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10c775350442da15805e910ef7e8c72ae5752f55ee8ac0d4b9812127592d6b3. 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/TCADE1715598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde534db0630b13e8b32f9b971b62d9e71efa60030ee8d55f847eacce412a8f33. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:02:43Z), 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/TCADE1716324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459c47cdfbc757ad091d4f98318a5ea36f40208f91c5d477d33e52bb25e358bb. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCADE1716348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb944e8d2ab127c1b67e7a48964d9d07d5abc02dd65ca3d12e98b23dc1ab354ee. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:51:17Z), 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/TCACT1601440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbc609892658ddacaf6ce413e637046e6e0ee3cf9a5e02bd968fce15194780d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:50:10Z), 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/SEVVF2007706.