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 0x7bdfd8cdff5d3d2caea79a8180ec62b566e93655da71e608c6a5961489a3ee27. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd135910-86c4-4d0b-b9f9-d3fa69829036.json and https://artists.proofprofile.net/proofs/artist/cd135910-86c4-4d0b-b9f9-d3fa69829036.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 0xac2dfec31f2deeb0cbfd318d8596fe57900fcf4782359afd36fc1c50a621b046. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:42Z), 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/TCACW1728929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3db725f9218de6f2f4cd4023c8efed662872c76146b1f9e67b017cefa6dd09. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:37:08Z), 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/TCADA1746736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73efa2b9e5bbdf5270bf94783a160b14b41164fa120066854b8301d447023d3e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCADA1746739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0489de59b7a51780c7f5b8ece782b0412c6c5721f5719b57c308dfd53ec66bc1. 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/TCADA1746753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6a4178e97ef4dfbc8030c53b64f8dcf4906f2d8aa44fbfa2f08a19c6a9e37. Chain 2 (Bitcoin): anchored in block 957535 (2026-07-11T07:11:01Z), 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/TCADA1746759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bd0e65a38ded344f95f08cfa35c012a713f91f949b88ae1c22610e5c95b789. 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/TCADA1746761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec2c73d4414fda53f269ed62254f93fbe18badeec5ddcce93314683865b1a85. 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/QZFZ62462572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94603269eea3bbab185c072ecad04c814296d2012aee0e5687cda6cd66689c7. 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/QZFZ32492492.