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 0x7118ca7b5cce41f688f311f605acff4567bbe2dbe9f339cb3f8951af1df88e7a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5121cf2-4806-4ded-adcf-42dee819bdef.json and https://artists.proofprofile.net/proofs/artist/c5121cf2-4806-4ded-adcf-42dee819bdef.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 0xb820347eb7b297cda06204cf0caf7df62534d7c1006957e0b7770cb088b80602. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHNA2506045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ed8ce4dfd98a2eba09d614a678e6ab5a4eecdc31a06518c6d046ef670776fb. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:58:26Z), 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/QZHNA2506046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cfbbb4ef9f24571b73fa6e52851d8b4ad26216f8cc59c3935baec39a9c96a4. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHNA2506047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4828ef028eb39636abb185759e542a275ac2496ebab86a17a4ce6a9c077e86a4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHNA2506048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d061c6f9a41577dc17c7cde07da8825f400eee461251bcace946338406469a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNA2506050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a2f1cf5ae18fce64cd20ffc3cd9b4be7954f26f32500802b18bf7f0d6bebf. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHNA2506052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aced88371073fa419d7f15bdcf7e0d03291fc7547052c48288e367c3547c724. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHNA2506053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c401d476c32c5291ec45812e8d0762e0d00e76fb5f2ccb0b9cf37d363fec92e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:20Z), 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/QZHNA2506054.