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 0x0d5b8c1a8348efb74a9b07ec6bb562c8ead9ff7159a8c2724e22fac3b10ae7ec. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3feeddb-15aa-4aa4-ab8e-5d9ececf7b21.json and https://artists.proofprofile.net/proofs/artist/f3feeddb-15aa-4aa4-ab8e-5d9ececf7b21.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 0x5aa1ffcd6f0f3238cee1955397c0507f4833b5b710687acd0c0be1fb14fd0744. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/AUXN22223907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c2086d541f17715e3e340e30059b16b766a71c3e8e93bb1b0d1c727ea1e6dd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUXN22223908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de3ca039e3a6907fa98811aa6f756654dafb456699cf1603d15429693f5e0c0. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:51:56Z), 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/AUXN22223909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28f624c54846205ae0513d5f6c449687b96ddd6d05f3249219a37c011df2b69. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUXN22223912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efb52027e2cb0a48606c4565f63ce623edfac1754627917bc81e455c9f130be. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:06:11Z), 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/AUXN22223913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0f74c2d9237e68ce32ed04e932c657318aa8123ba9859d406df8ffcd1c930e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/AUXN22223916.