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 0xbeeb90354b8ec3bc7bb76505cbeb6a693da5381b333fb8b0dc143f39ddbd4fbb. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01d506a4-86b1-43f6-a5bb-ba890c16ee38.json and https://artists.proofprofile.net/proofs/artist/01d506a4-86b1-43f6-a5bb-ba890c16ee38.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 0xcd89c88c67d4b3f043d7aa1b98da17fe0c4b4ddc72f19b4eebf12d91ac4cfd03. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZAAJ1900633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789b38c6e234ac5ced6807a36a6e6644049c7f23d0f9b9748aac6d461244c5bc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZAAJ1900631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd739bb30cfd181177afb6639fb2565d8a0d2be966f69a4cd8e0a13161f34983f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZAAJ1902364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd89c88c67d4b3f043d7aa1b98da17fe0c4b4ddc72f19b4eebf12d91ac4cfd03. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZAAJ1900633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a722031308590c7bf28b444eeb3809d94104d2bf6800c4321001bde49cfc3b0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:10:57Z), 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/QZAAJ1900627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789b38c6e234ac5ced6807a36a6e6644049c7f23d0f9b9748aac6d461244c5bc. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZAAJ1900631.