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 0x111909bb8171d7a9a673af1f7b4cb88aa7ea624aaffdb0d07e9f479cacb4caba. 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/894744c3-70be-46b6-9535-6c2a5bec58c8.json and https://artists.proofprofile.net/proofs/artist/894744c3-70be-46b6-9535-6c2a5bec58c8.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 0x9b571b04bfd14f80b75e388486e9ee7e799552510dea549f17be5f5fdf4934d0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZQ7Z2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f37b53004fa53bde01abe1c6ed7fcac5475bf9af398b27595e626c91de8af5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZQ7Z2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fdb77ee252ec6bc99fd61c776ccdf73bafeca2610467bcb6f1188516c0b29e. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QZQ7Z2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcf168ccccfd5da7cc7130278f028ebd1040b86bee576ec84920ec4f95820d0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZQ7Z2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e85b132e97552afc7089e44c0f75af812c04c23aae3e9833f88c6538861b6d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZQ7Z2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdcc3fd7cbd0ba2ec9ea086e360dad81a1a2234fb4a5f89986e75137c9a91be. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:10:16Z), 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/QZQ7Z2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d66c78062a1ed2c31fd7601149ae4c33509bca1f4d30e28fda0c930684a4e0. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:31:11Z), 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/QZQ7Z2100017.