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 0xab6eaa6be251ca7fceda6f103e9b0c67bd15899be11d98f097e637efe61adcdd. 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/c453245d-d3a0-4059-85dc-fdf8508a2d38.json and https://artists.proofprofile.net/proofs/artist/c453245d-d3a0-4059-85dc-fdf8508a2d38.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 0x4ad3139a78c9b7f93a2a6fdd9f5f027ecaf995ee0762e8edb9fb008503fc420c. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:43:34Z), 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/FR9W12339854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5e04726d0e8723f216925c6a5b487a8dcccc0022688f6d7ab9a3611d6eae6f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/FR9W12339856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bc597325de71b4993ac63763ed319336bbc5b975d5c5fd839ca77a2c71b61f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:30:11Z), 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/FR9W12434625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3860ea6571d4feef43abd4e00f3a350ddf29f7c3f1cc15b8badd0abd5038badd. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:51:20Z), 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/FR9W12452401.