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 0xb817ad361d4e71a6802cc61ef9d6f50b305b6fe8957d4860bce1d8e353820afd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/224cf9a3-cc1a-43e1-8478-6c523dfc9f2d.json and https://artists.proofprofile.net/proofs/artist/224cf9a3-cc1a-43e1-8478-6c523dfc9f2d.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 0x3d05c2a48a1fb8256399e9e081e58016059ca99ff5c6a02626f35dd8fa028dd9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:29Z), 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/QZHN32416495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ce6cabd08c0af7fe8228ce5b45e8756696864ecdb6531c35c0d423ed2935e8. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:41:22Z), 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/QZWFH2496953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c381ba90e2966e77352fe783c73bca9897c74e924c522e80e858b1eb1bef048. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFH2496954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6731ffc85722dafc342002ea8f1244ec82c7d0cc8408466ab7a01f0ca33af6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:54Z), 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/QZWFH2496955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334534420d37f875120be10c5db065ad52ba0a1c4ba70bafc48156d3e87dae85. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ7S2479009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3066e34d26a5166c3ded889ecfd68c0519cec1b832fb565302e199b4cb959990. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6N2587960.