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 0x177551d282425fd9f9cdc350f0faa110af82a47b02f4e5ed0c0e5945cfcc1e41. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ed3a8cc-3480-4cdd-a0e7-f0805d8137ac.json and https://artists.proofprofile.net/proofs/artist/8ed3a8cc-3480-4cdd-a0e7-f0805d8137ac.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 0x424609877ac1132c950773fc30e5edb16a351afaab97cfd4a8b4bc20b7c73bad. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZRP52409801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c86c709d3b1e5f7f5b42ba266b5aabb31338a8c944515fcbbba1756f8c1294c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTB42428859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096c175e713d912555c2dd599c7442547dfbaf971d194924c4b19f5a21e1d7d9. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:07:07Z), 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/QZZ7X2467707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e39e64f6c0fee7e2afcfc62998aae1b3af49f0cd1224c56cf25d77ac7d42211. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7X2467709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8272e50fe12db96be770c4b0c0a2f275ceb8fc499b7cb573b9d305dd9f67e96a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:21Z), 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/QZK6L2555934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f30be223289eede1ae3d71dbaf2866eae7a7988edcaec596b814d8b63cdaaf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZRP42568127.