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 0xa9198d7b305ae4e65e20e3c4f4e1480d8aabbf2a8dd9025cb1f066f095e7643c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69ead30e-7a37-4071-a358-db8db1a83f1b.json and https://artists.proofprofile.net/proofs/artist/69ead30e-7a37-4071-a358-db8db1a83f1b.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 0x261f77d3d54b7f0cd621ca301de86fac5c4f1fbba47fbf15b6dd887fea703fce. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:21:07Z), 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/ES71G2103711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55564f2c139a9d3dce8b5171f0522d49a8006ec0ec4e7d8f9ae984d7e1700370. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:34:20Z), 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/ES71G2103714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8a8832deeaf25bb57fc8f32e225a1f683a1f9175a5c3b50b072761a08bd8e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES71G2103715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175adffda58437cb536862ba0fc79f4e29a22e1732a04ac1d130185fca1e1abe. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:33:32Z), 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/ES71G2103716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa50fffa3a12a5729cd336e4fe1bdd4abdbd5d6e7f5a9890bb8c2c37645afa3. 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/ES71G2103718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b21cf7467538fe97183cb2548a7f81c13c9ad05825f4f63771d1f9aaec6c401. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES71G2103719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5d49fb10f7621b346fc5fd18855ef37587f3e63dc226fc232a844736b18b6d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR59R2309878.