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 0x1a2d135a80139fa594240e242606977ae11c3253e9887c961ee6ed0785595ed3. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/124ef51b-ae4a-4182-8d6c-81ef98a122e2.json and https://artists.proofprofile.net/proofs/artist/124ef51b-ae4a-4182-8d6c-81ef98a122e2.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 0xf979215c4f64506db735441f27b62d2c74f14d44f2e072c0b31508bd5978ca6c. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:55:53Z), 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/ES75E2409153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf979215c4f64506db735441f27b62d2c74f14d44f2e072c0b31508bd5978ca6c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ES75E2409153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ebe12056561fdd8116a8473e105d81bed9d1795170f040bae9d08b1768e3f7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES75E2508650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab5e6939a95b903a8bcf120af8feec3915816ac591b4b0653fab0a7ef244495. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:00:44Z), 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/ES75E2508651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36dd9f0f37a08c5ae2ffe91f740d01934d848466b075cc88ec16ac15d997e1b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:22:42Z), 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/ES75E2508654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554cb8cb1a8feb2f0f8c079c64d0d54b25bc7d1af1ed17763f80a6a83ccb7a22. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES75E2510793.