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 0x9db7619645a90d8d80aa91026b2360f87e4f980de2e35fc921d82397d98cd946. 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/6374161d-f097-475e-8fe0-22150d3e2198.json and https://artists.proofprofile.net/proofs/artist/6374161d-f097-475e-8fe0-22150d3e2198.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 0x004a55d9123f5acf43eaa3c5c44a1ba0623bc9b48f99d1a35433a023a00c62d6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IDB772109460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee80b414e878341dd18aba7b6d18ac0c76c3605dc88322ea59ef4eba344917. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:11Z), 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/AEA3A2586603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a70463bd01506d6b662bb771b4787ba791806ebd721593a621401fb46e709ed. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:25:41Z), 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/AEA3A2555077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64c9ea44d5539115b3f617ec4838e69786120e33f6ae81758fd82b5ec834849. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/AEA3A2564616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51401c4ce5432a4f5dee0ca422efe836d273773bbc9deed598fc8c9b290cf275. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AEA3A2542766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94af42ccc917e8d0c9f76a5dfd7e94af7447dec81541e455a1ac5fe24a2223cb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXBAV2186434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadee561bfdd8bc5aafdf598658c9d1e8cfd7e99df46ce4fa73c1818b9a6d1bd7. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GXBAV2021436.