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 0x3177687b817a7cdf8ed0322a1747c2c0aabd2b7f5b29f46c633ac6b709649332. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ca0344a-70ab-4b2a-b388-4367cf7b5e1c.json and https://artists.proofprofile.net/proofs/artist/2ca0344a-70ab-4b2a-b388-4367cf7b5e1c.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 0xf53d36bdef55c6e043205665be35121f98059ee5b06cd195ab8dfa76b6334d99. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:52:09Z), 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/USJE61701069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8818d7b374d70ac335e694c6a40dbe21b955f8111fbcd0f4cd6aad0935c53d7d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USJE61701071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fc829bb5008701ffcd80f86cd82a79218661a825783cefe44bb0ef03eea9b9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:30Z), 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/USJE61701072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848bb2c4a4ebc685d5eab87bb1c4534ebf31e7c7a885920c797487503d9c26bd. 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/USJE61701073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6312642ea89d09ed33d29a2e229ca96b70923c16a75914810f64ec95e23501. 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/USJE61701074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae695d3967c686d9099834732388ec5922276b2d112dc7658a3665658db9446c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USJE61701075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57d7c8398fb6ca7b8f20e32f1dccdee21e6480ed1c6513d8bc2f7fa32c53af9. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USJE61701076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42749316a8caa9b873c8475efa5fefdc2d178095551f1b6648803750d106d736. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USJE61701077.