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 0x1f7024cba5aba1f5809c6be6c24223f7fd3ab9cd2e987a3d153bda5cf72ae81e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28d4fd8d-0592-40c1-8ea8-15625f859d68.json and https://artists.proofprofile.net/proofs/artist/28d4fd8d-0592-40c1-8ea8-15625f859d68.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 0x9677070cb43ca6989ff83203a8461ae9179b3beae2c652a00dd9b911cd9ebad8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ62091958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7e13cd1778502dec2885a66542a6bcdd3467684f44fd2283caa0d4e6fe507b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:04Z), 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/QZHNA1982529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5d224d722e679880c7480b364167c489447c7296bf96ff6805bd1b91b91370. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNA1915252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f0da3a9e0c76f17af103364948a0c63f590899ac8b7b4da4f31e5be20c0e5c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:27:57Z), 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/QZRP42185567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6d01b80479088a22cea3401ca53f6ac429a5ac8de02553306aa020da47149f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHNB2282504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37007f3f0ccd518f7c7696825a5e9b69f73d72624eac18e68dfeabc49c10c748. 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/QZMEQ2277914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cee6733b7c594b3cbba40fb194592fd71e1aae47e485ba244fcfa37bffbfd87. 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/QZTAX2243967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cc5b904f6edacd12653be69668761b88d1e09ed6e3bcf75c808c41471f3f9e. 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/QZNWU2357015.