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 0xa3bcc310dfdde29a924f51414699d43f98e06ef8893e3c901f7e1412779f18e7. 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/32d28d3c-a130-4e09-810e-437149992544.json and https://artists.proofprofile.net/proofs/artist/32d28d3c-a130-4e09-810e-437149992544.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 0xc5d3dea6770bb0f5bfd62c5afd9e3a41c90cccb2b77b68be8e0b12096afcffbc. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:26:42Z), 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/QZK6G2211735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aca0fd250d1bdd7f22f998268987c5d6d166c090fce044d36f476a258923bb. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZK6G2211736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99a2cf8fffb80cbf548592df49db2fda67c222190a1e8c2a3512a5c27cbf749. 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/QZK6Q2301256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4b4784b501abbf294e79a888ba99a625e8e0263adff1fa8ac327c0f2315b01. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6Q2301257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a24b825b351300b73486e409a0aaf01debab072e66442964e761e33ef202ef8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFZ42599504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77352d2c559e5487faf6ffbb8d1e4989d2e02d4b1d7f01b377c04a0ba529b2dd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:37:04Z), 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/QZFZ42599505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5fe2834f4cf7c53bf0059866624c405be3b91ae3d12070367447111196e636. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFZ42599542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a5233b5aca462baa5d9d7f41b9903de7b9a906b9711c9b3dd0db03ab1acf61. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42599509.