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 0xe57b6818c00b3e738bce9f918de00be2725ecd123a05700c9874a45cdd134cc4. 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/a781d8e8-2b58-4421-bdba-da597978ef82.json and https://artists.proofprofile.net/proofs/artist/a781d8e8-2b58-4421-bdba-da597978ef82.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 0x7e30bb7581f62b8d45af3fa18c658e56598c0ba12572a7cdc9fd75a49812b1f6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:35:02Z), 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/QZTB82434851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a905975ee6d560deea4c5e5fb0950ec31f7aa57dd00e5ed2ad3d2e1d1403d. 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/QZTAY2468341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c6f9cd45610f7b75b875d2201ddd36e5705c5e1e2c7fa779277e35f4351c97. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:22:12Z), 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/QZWFN2491923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e30bb7581f62b8d45af3fa18c658e56598c0ba12572a7cdc9fd75a49812b1f6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB82434851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a905975ee6d560deea4c5e5fb0950ec31f7aa57dd00e5ed2ad3d2e1d1403d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAY2468341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa6f1ccefecf75abd9e338fd5fa91c49b17f93e2f547eabe578d830f3c50ab9. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/GXD2A2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9bda682e96d0fd3b27c5fe0a7a87cf90d559a7acc5cec84d7406dd88960aba. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IEWNY2315103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee73f4338dda850825777e327b93e30d36c08f17dd61ad5b655b1041ea53a511. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZZ7P2522307.