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 0x31ed2f6879716758489feb664f486f5202459f59aa725ddb39520c9062b64345. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c12be252-2a5d-4ece-a693-08d37d4a978c.json and https://artists.proofprofile.net/proofs/artist/c12be252-2a5d-4ece-a693-08d37d4a978c.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 0x418f8b63f5fca738e8d8b22b68f6113bba0156b899cb0470e242fbe5ae6413d6. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USDCH1033646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7f299cb0f45aa18b6d0cffc42bb5edbce81a245512718e760e8347721496df. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:53Z), 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/USDCH1033659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1534f1846db28dd616ea9ca47d1892e9d94210bdb225299e567b3470718c4c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USDCH1032099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f492d55ba39d19c05aa06b76d6f95c002b2b644d385b4fcb8645eaccc396913. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USDCH1032100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b6894912bd36148d3645e75c15a68be84df5c7cd1dd75aae207b9c38baa7f1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:35Z), 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/INS651004704.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0d496f852202bdd32411b0d1cdedea769cf891f34a2738b96e4c6475d031ec. 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/INB982507240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff294f37126f843d7c299500c27a2fd8076ab6d79f9a08f630347cb0df48bac. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/INB982507163.