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 0xd23b3ebb45445e289abaadc43c4decc888bb7733cbdc34a3033b62a42ed8f8c6. 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/b84af1e3-d5df-4577-b363-75c6335e2efb.json and https://artists.proofprofile.net/proofs/artist/b84af1e3-d5df-4577-b363-75c6335e2efb.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 0x63d0d85dd46bbcc99ab8dc616abfcd842d607115366dfda012b27b8cac806358. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZFYZ2335638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac66ce30fe30db56bf3f26765baee78edf1c3362aa39eb016af8cbf4f00f301e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:22:18Z), 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/QZK6P2368032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77d550d6e8726d27093822e5854b9b1e099d5ddf37ef0f3ef253f098d0f5a41. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:56Z), 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/QZNWY2381721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5afb0b01e864832f3e0386065fdb887c7f571ce5bba55b2a0e711c49283567b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ772483918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9af1fed7557bada76b33bf8b51e219db2f943e51360f7151c1968d8441493d9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:04Z), 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/QZFZ62560495.