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 0x6af0209c09a1099db2484d87ce9fe9bfeedf2eba7f6a91a91225018ba5ff606e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/743851c2-3369-43fc-9d4c-f131d37b5b6e.json and https://artists.proofprofile.net/proofs/artist/743851c2-3369-43fc-9d4c-f131d37b5b6e.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 0x4d460e04cebee468c696bcaa0a583116bca5bf9fc7c9c62b6456760442fe871e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:41Z), 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/TCAGY2384581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650cd9dc299c39f9a9a9493ebc7eccd642a7df09e0a20b1bf05ce0d93111e55b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAII2461491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b3cc1fff0eb47cb7ef305bc2f5613c77787241109d3620e78e4c113f3f4f5e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:52Z), 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/TCAJL2567691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf077ef70f14949dbc58d7dd5e67144e645a503978f3c0df778a536b7040185d0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:39:22Z), 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/GXHG92582259.