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 0x9751ee6a8f80ce2882b23f3ffd62266318e6807b88d79ca653e6966048af6f83. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4afd98f4-3a03-4cdb-8aa3-9ebc0ff1376e.json and https://artists.proofprofile.net/proofs/artist/4afd98f4-3a03-4cdb-8aa3-9ebc0ff1376e.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 0xa14c1d3ebd60f8465d492b6ca6f28bc21ded79393541b3d84900be114f734516. 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/DE1JN2473519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea212dc1426ecf8e330b98c5552c2a731c0a94bea414cc057932ea26d5eafad9. 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/DE1JN2473187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f48296ea8bd95629ea3bab4614d814992969ef2bf4e7501a78f6d72b16ebce. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:21:14Z), 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/DE1JN2473451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69314cd8aecfca81419fc4993d74a009acd4e5a1cbda595c548a2ec5adadf630. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DE1JN2473711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf148baaf372adda427032950f7b6cd1b03a71d9ca1645ca85813a7fd02a37eeb. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:03Z), 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/DE1JN2473464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3727366f8d6950d129126bfdadf5a691983af15ab11ff91cd858298cbdb932b5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:28:48Z), 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/DE1JN2473350.