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 0xd48f5e03af42c32771a8f0645c8c994a5428db669e775c1ec3c56d4ab07bfc75. 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/aed88d39-cc87-4d0d-a843-4bbcbae66793.json and https://artists.proofprofile.net/proofs/artist/aed88d39-cc87-4d0d-a843-4bbcbae66793.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 0xd487b6f468850fe0e285e8a824dd01f18d1f238e721dc91033eed03f92237240. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:03Z), 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/QZHZ42204586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa579b5ce7b65be4d80c7635f234ee84e83321cc78d325ab2a5999ab04ab53d0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:42:41Z), 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/QZHZ42204587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394981534632ef659fc0945670a32430327bb1cc0592a168c217c6fadde05967. 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/QZHZ42204589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746c8bf18c6c24eae42f6ea207c2fa475d37e863d1a29ffc9d1288d562c7c7b9. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZHZ42204590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237c1e5d82ae07240657c0ae4cd3e67ab770297cb9aac5d62037bf1c0072acfb. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHZ42204591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d8e22cf86bd36123cc25b0b449a5c11a0fb5626d7bddc9a6d9cc4b2b54abc. 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/QZHZ42204592.