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 0x10dbf51f384640ae3e74af1325a6780706c3f787e9391080b711bbd0641f0040. 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/f50b08c9-73b5-4bf8-8a9c-2febeb053289.json and https://artists.proofprofile.net/proofs/artist/f50b08c9-73b5-4bf8-8a9c-2febeb053289.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 0x70fdeae662362bbf2c000aae6a453c4d05649dbc05450b3a28f4b5c489c8a622. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7812216044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619217694c03124369e2f3ab67263aabd3bb996fdc06b4f0be3ccce93b0c0ef6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:51Z), 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/DEQ022380612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7f0d423533f3df2b3e17d7355d4a5b96fb9f3771a3bc62271ce01e2a7dafce. 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/DEQ022380855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135856096eaae1d0e626d9aa98a4d7a47b833c325c85c2c6c189b1ccf5e5ee73. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX282493438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8206fe0f69f80b5c3b8b59dd2f4bc4dd787501635017a9c42a73ffdaf0980d. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/CH7812535185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b1b5600966525cacf2fe8032a6df561cffb33fb629849c4fad98eb2586b1db. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH7812538340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290cda13dbfcd8cd327387bf6d0679db28c0ce1d0ead057f8812319b5055ccf8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:46:39Z), 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/CH7812540669.