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 0x245a42877829de91567253a23fdd8c7e14b4f5e46558468e8ecf9ac3f1f1ee87. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f6f91cb-d2eb-4f62-84b5-0fc5fb41f304.json and https://artists.proofprofile.net/proofs/artist/5f6f91cb-d2eb-4f62-84b5-0fc5fb41f304.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 0xa9fa8e2fc0d805719670f5da7d8e06597ca3aa44c69eae6cc66e8b87f4b80bd5. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:25:58Z), 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/QZE842500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72862a7f8b58b0bc46aba1814a997ac0654b5a63e856c42b3d4dd6dc3d4c2825. 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/QZE842500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f4423c726ed93de803f1a652e979c966ba22eee4f1eeca622d56e67e0d19ca. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZE842500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b9810805f8f39d9ad24e27418a6a63a4db6652520b9cf6252a5ad0f7d5bce6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZE842500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e6fadef17936d4f3f3156745e8f5f395f06c0a04c23f6f08aeb6f6aaebda6a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:02:49Z), 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/QZE842500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc042c99b14e700aeda0d8af6a62789027abbb2427fc95f84ba4b811e059931a0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:49Z), 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/QZE842500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1212644530b5ca1f66cafddda259b0122b5d220408b09e896a1ac841cc8dff5. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZE842500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654a851a89d745041d287d059269b29fb34edbeb74d6176d30fa2136394b54f2. 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/QZE842500232.