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 0x08c1aa042867c87d96a950b4ae4d559a8c09fd74977f49a44df678034bc7edf9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62fccb15-360c-4e67-9a9b-52f63845a0ef.json and https://artists.proofprofile.net/proofs/artist/62fccb15-360c-4e67-9a9b-52f63845a0ef.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 0x72693d6c4c33aff1dbccb28a1e66c3d925da431faecc764db92bbca42c95a21a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAPJB2201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb926cd705ffe8cdae3112991ae92f785c4d19cb8f53a2653e59779d0a8d384ed. 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/CAPJB2403001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428e1b562d680c8e0235e128e9b3acaa3e5a14f65f4b20536c1aff7a05575ad1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CAPJB2416002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8cd2df46f971bc4246d8de8d08b6fc0ee9e00924f2bd639b9bdbb4c86922b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAPJB2416005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143b35ba89f4e2ae62d9ea089401e68e842db5f70d5fc07ff7cd15991b90f41a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:33Z), 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/CAPJB2416010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8cd2df46f971bc4246d8de8d08b6fc0ee9e00924f2bd639b9bdbb4c86922b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:24Z), 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/CAPJB2416005.