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 0x0eb8536af4290eefd4da9f48b11f9c5fb3a9801ab973ea829ddb3be43eb28dd6. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6c0c5b1-0d56-477a-ab3d-a27ab66cedc1.json and https://artists.proofprofile.net/proofs/artist/d6c0c5b1-0d56-477a-ab3d-a27ab66cedc1.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 0xa122e82e1565de84bf55694d5cd7366ea7b831f8489a2ec03b9c6db9f12e5e49. 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/TCADM1813622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8830fa3554a966ec58ae4d89879b538e059bd3e085a5ecd10b1379e2e78f70af. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/TCADP1808098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7484239371ce6664f85a001bc993ce29ad0d88d63664a55c8050602afe3fe2c7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:13Z), 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/TCADP1808141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88427ceb2872c5e4f75b1185f232422cddea1bd856fbe11a515c6b345f457148. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:08:02Z), 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/TCAEF1927442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5cc4534ecbe58634e57e7bd4962216054ea18bab0c3d0e3a952b6ebb9051ee. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:39:07Z), 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/TCAEF1927446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95af970c1184334db07f5ea0cbd0f5d97a1cd756d7e32249e450d87a10f59b89. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAHP2366969.