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 0x5340db49e269fa2454c5afb46a4b6cc0e33670f9702a14c7ee03b19f4a8ec0bc. 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/3f3f779d-4988-4421-86a5-936ca11b294d.json and https://artists.proofprofile.net/proofs/artist/3f3f779d-4988-4421-86a5-936ca11b294d.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 0x886c49bcecf11d9ea373c66bbc70fc3685992955c7dfeeb37865f226b208b435. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:07:47Z), 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/USCGJ0719359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3a21a365b28775ef65597a2055bedf0c29a3a63d25fa9d7cad1eff382c7219. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US6VV1220001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf925de88be61e4139678f87ddfb95b3510ae34126dd5cd305f7e9da0dc17724. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZQAY2201898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f41939cd6557c2141e5a01c56b07f612d8b3b5ddc8015ce6a2e61721f6ea66. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTLA2242515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43e7ab73e5083075f8f6cd34d10dd6fe9f27e43be3c11c4b910749bcd516e7f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZQAY2288069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20439c015390be2f3b0fa51ec0293c8070cd2d00c6c79080b8ce47c037e3cff5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZQAY2266188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8688ec39c90c46b0ffad3463bfde12154934a884918df9dc206a72134fb501. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:32:38Z), 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/QZQAY2228454.