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 0x204db94faf3dbcf78602051d6f3674ccb35505906f57cb8301722bb2b929d64e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3eea633-0403-42a4-9af8-9639a6646634.json and https://artists.proofprofile.net/proofs/artist/b3eea633-0403-42a4-9af8-9639a6646634.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 0xe281a89a148ffde4ce172a61fb83f20dab9f6f185d62780652ebc42f6b9fd0c5. 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/US7VG1677773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56c0ea02fdfb0559ae43407a7389bb6758175e8c47ac347385270fa1032de61. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:19:34Z), 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/US7VG1677779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9c2b00db9c1d47711829334379aa000ff2de3e49e8b1cf01440502d49a19a5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US7VG1682769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9350c158e4d0cccf9afebca1a1bfcc4857858b7242829febf68a5cb489d1a3f5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US7VG1682770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47d6c28ec4f72a252d2b648bbcebe457d8fa168b8f4747a66968bf4f1d791a4. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US7VG1682772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9964b6e10e677f965aaaa96bb43a212bd47b262889d84b9c05c99a55c52750fa. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:49Z), 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/US7VG1988923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e63c438f8f43160d89d659134a482047c747671d850241354d8a096fc87f5f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4Q2354350.