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 0x4b29cec0c8bf1cdd54bf71dfad09797d5e55cb04bc4a88e86cb9d3f26b064bbf. 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/ce505ccf-86c3-4ee3-9bee-31c268c19f1e.json and https://artists.proofprofile.net/proofs/artist/ce505ccf-86c3-4ee3-9bee-31c268c19f1e.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 0xb39b79848365d1f8b260bf12017db4130e883663a0eebe415216a56ad0d5e653. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:53:55Z), 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/QZDFP2151804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09ab6c1e95e8e568e933cadc456bbfe95a87a661c1693b290b622c772d9e720. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFYY2544699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7be18c02f38570be6f5de02d865b2a8163123b27bc959d0abd08435b0ae4a0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN32533584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b88d9bde9757fb241e176c6c72a2bdf955ae58ef7d805947b0d49e38d3a5147. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:13:41Z), 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/QZK6F2589475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3805deba4e64ba8b8863d972e9f3f480d1c21d57898eeb5a17fe4e26c259da14. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFF2541296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0051484dcc6edfa7d85c7aa7530a751a4cb96ab623e75327af9b6dcdba7afa. 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/QT3EZ2532583.