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 0x1334fcb8274d2ca46eae38a8c92fe0650da10f2e661b531b73cb30e0732768aa. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea97660a-8c7c-4e34-8473-d51743a49f3b.json and https://artists.proofprofile.net/proofs/artist/ea97660a-8c7c-4e34-8473-d51743a49f3b.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 0x3def6d8ff357a4d43bf9a5a8ba2566101686be6f497bdf2e3891de93c4b42c0f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FIPPZ2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe169583be616a4ab82f5c81c7b807a99b14e33279029b4f67e789599c2a86b04. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIPPZ2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda44c0f02bff8d3ba5d9cc6d208b8e9b03b82f84806f9495218f0f0303208071. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:30Z), 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/FIPPZ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda960520f456fce26103dfbaef1a710f46b6329630de89486c04e14a4029ecfa. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:19:14Z), 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/FIPPZ2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32072e39803603d729b6860d62d58787ff28e2d6551fb1252bfb7f7617b338ef. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FIPPZ2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9726e377411af2a4a2b4e9bb6c79f505790e0bb585e7804496b5816ac93a05d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FIPPZ2500028.