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 0x806d427f8ba5e6e46b3e1bc566473ff99724efd4a7b97301342b4d71da2e413b. 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/700e33a6-6c56-4e93-b764-ce2cbffe447c.json and https://artists.proofprofile.net/proofs/artist/700e33a6-6c56-4e93-b764-ce2cbffe447c.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 0x8433394fbc59ca269f6adfb01968e6d276243c405edf7ac190e769fee926e331. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:25:21Z), 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/USCA20300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e7112a374f2521b17be5830677a3ec62d98254bb842eb9528641e5c97827d6. 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/USCA20300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd150522710dbfd357ef258b91ba468a4b93e17f80d8f3a1fac14a18d08299a8. 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/USCA20300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a7b54417a4389e1bab117d3c9b98e142dc7ebcca7e7417d85732f2b0ef7693. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:00Z), 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/USCA20300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f90a36ebafb2bc655d53cfa71d823af49c01f23b9cc9dc3589ce96a0c1cd01. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCA20300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22d0dfb788cdee468934a7d6443c630a6940d8860903f0287f78433b8e8f548. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USCA20500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac15a807607b98559d2ae55bd3e858d62b6b7b31490fa80aa60bc62e350360f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USQY51304649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cf4cb721892b6ae8fa086fbba67239843b4ee50b388cd94ff6ba1562306d1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCA20300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf462554b52329cde660bd0779728f9974c56a6cba9866a41e2fe3c679cc0fea2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCA20300200.