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 0x684078aad815801e9af3c471218ad0e077d713e76701b12063023f6bfc76b3b9. 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/27b4dcfb-4e9e-4ff2-9b44-21255f2b0460.json and https://artists.proofprofile.net/proofs/artist/27b4dcfb-4e9e-4ff2-9b44-21255f2b0460.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 0xdd577bcc2fbd99bdb19c168f8bad941116a34cb7bc8cd4f0236af6e81a72de03. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:17:05Z), 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/UK6R71900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fc2d27d168f28f798d716f28ff9e77874dd31110b9c25f1f7680ad2eeb83be. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKXN22068439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6fc570932ff303c66f9c95703cfb4763c0fcd0d6a31bef2346ef5f5124bc9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/UK6R72000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c1dbaf3161422036149a530798aaf8830f6b83a66510c0b628b22fcd6f6f7f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UK6R72100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f9f93b1d67bf4dc26174a68b495530aabd70116c1391ee847d15b4ad2daf9d. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/UK6R72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489bcbde1e68416b803d445c25bc4ce4beda01ae4b7990cdb2f4db78432d5906. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/UK6R72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1e9c5528c11792b56be986d1516c71e585feae54a844ba69b510f5a09a3ab8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UK6R72300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e25778a5cd678a432b690c106e60cbe63cbb07566222d2ee89b42b8ee2346d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/UK6R72500001.