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 0x329f6354b25b32c0878146c54ec73ee0d1913f386647408aea43d2cf3afe8dcd. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/594840fa-795d-47d1-9b75-ae6de0ae889a.json and https://artists.proofprofile.net/proofs/artist/594840fa-795d-47d1-9b75-ae6de0ae889a.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 0x95b12417259e2b190395c2258795622c2820f86c25dcfe18f76f50b129253e2a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GX53U2319347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56336517fdd8bce56489ea05ce23ccfa94eedc6ba23370cd8449b94d5924013b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:24:23Z), 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/GX53U2319348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b7b04aeba4d9d16c66c9d8d0a1894f3ce81a603b078008fa004273a6cedbdc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:07:52Z), 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/GX53U2319349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214e262e8a7d77e8232fb9d0efe6296ed9a56dc36131db32062adb0e43462f64. 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/GX53U2319350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaae952540632977b9715a3b1ae60f8dd4567c2678654c13e08c4cc529a131e4. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:16:05Z), 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/GX53U2319351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe31951aca8660a64dc3080e44f896df93ee0f011b83055bb56776314a8b637f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWS2390596.