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 0x105994a8e72c979ab294933157461ac6721af91f181b44a74603a96fa4889e71. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2b1d6ef-976b-4ab1-9053-77884c68f1d6.json and https://artists.proofprofile.net/proofs/artist/f2b1d6ef-976b-4ab1-9053-77884c68f1d6.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 0xd387f093f657cc3c59deebb82071428ccf5eb7f930e27a89a569915e0204c018. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTAT2256878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f57f96387c702673f0b38df30f112bc99dfb20da6e455429b1e381e04d6cbeb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:39:25Z), 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/QZTB32498334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf305556cb67650bd08b5c80fe7691affecd5c79f0b00c5a68aafde46588e65d7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:44Z), 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/QZWFU2435489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3bc345c78e3ff5867880b88b79c676692095935a52c687581abf17e1f7503d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:51:53Z), 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/QZTBF2319993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586aabb02986addd4611698f9b9671e0ec7cf89dbe8b367fd749bfbcd92aea36. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFM2391785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc22c04ca7c1711867b3106f8449e02680972a3322b42951fae593ec7bf50ce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6J2448946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7215dd23284bfb9364965bbd3bdb46cc637d57945c65b35341ab15f80b3a9b6c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42579995.