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 0xe50ab805e069dbe48bb0ed553a6e59045c325049c27fee7fdae57e4e799d4f36. 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/61ef011f-b0eb-47e1-8524-0631b08d5f06.json and https://artists.proofprofile.net/proofs/artist/61ef011f-b0eb-47e1-8524-0631b08d5f06.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 0x1d6452d3808f4013cb96c10f48044d054ab76efda0c07645ceedbcb7626bfae6. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:07:48Z), 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/GBKQU1295432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c4e195622c9d72bbdff484bdb24235f46cc3ce6998ef9e17ea1134c448808d. 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/ITD451500561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae53e859c20c6d089f79dbd1fa1edde49af20e5eba6a4458a60a0511ef8a7a3a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:16Z), 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/GBLV61612975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6316599814ba501cb522302be4b2e41498a41b9e4e8a32ba59467c89577e8baf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU2013237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0660c536218602104eb2121a2b5b2bb1f4924c97b7e73da7927b38784dbb70b. 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/GBKQU2052498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294b72677a63b8cdf6181ca4521eb45f446cad14536457ed0d08b7354741d31f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:25Z), 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/GBKQU2345280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653a7cc8c1c8ff82db939a6b04063db13605bcce5f7b74c403842732cba25968. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBLV62321794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d00a17a7a154bf0cdeb4b888113d4eed77322147b341a93c4cfa9f9b15ce0b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV61642933.