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 0x3acca02dbafff3f621944904e5e94730d257b8610caac99f96ae0893ed36d42b. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad7e173f-09ea-46c1-97e4-718435de0f4c.json and https://artists.proofprofile.net/proofs/artist/ad7e173f-09ea-46c1-97e4-718435de0f4c.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 0xfec871c09666307323b8c577df09d7435d51454a3d30cf33be5d8d1881f96528. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNA2049119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458b0d1b4755da3cdc52b1c0eb10e3cb4e5ed58659d976ce3a9688f91c4e6685. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:38Z), 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/QZHNA2087565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c504f18b5c579b4f46f7524e5d1012874c83fc588d4e4b4b070bb0ee86b2a5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:03:03Z), 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/QZHNA2087566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5e2747a6e24d771943d5d3d3dfd86ad197446b75e0e48b525deda3be58d507. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:43:02Z), 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/QZHNA2087204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb152adad8b852d6333f80cb3113f5d5d4316247d89f145bceb80c52b12c934. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZHNB2026808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69eb81a95557176f1e7b79f4576391c4719f37d863a04ed1d6cd84bff181f08. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEN2193460.