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 0x9316f7d88f5469f43094ec51f57ddf7a00a26e039485a985e72a88dff0466c45. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ca81fa0-5f78-4ad8-8515-82857a7a1c3d.json and https://artists.proofprofile.net/proofs/artist/3ca81fa0-5f78-4ad8-8515-82857a7a1c3d.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 0x5d7c519b3acfade70fabff0e776cf392bf3149b44694c531f2e079717fc430b8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:02Z), 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/QZTBA2581879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a91b9f1f01fe8dc4d764fcfa017f0b9dd74719731c4e4a331995dca805e16d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:58Z), 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/QZTBA2598884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4cfb4f85951213fd7f9d8aa1cb831ba73db2190e00bde08156d86a13d55f54. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZWFF2563896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15ac20bc0c9a0221f47324be5125efb75076aa326b40834d8e88c97e5f67a5a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:39Z), 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/QZWFK2502350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ecf129707a9045f39700090cd4e20ae83d8e7da6fd3602b7e545d28c29c58b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:18Z), 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/QZZ772560038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c233740644b4b5e4ae81acaea611f0d205b5d2244c66fd44f684514fdd5157. 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/QT6622573030.