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 0x0430dee3338293866b7fce905e1efc270af6049716bead65ede35682ed4e8fa7. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9c35c41-95ef-445c-9ba9-e0a8e6d52d19.json and https://artists.proofprofile.net/proofs/artist/b9c35c41-95ef-445c-9ba9-e0a8e6d52d19.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 0xefea9f14c93e298ee47f28f5bb632aa6da94792d60aab060f6f4616adfe51da4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:44:30Z), 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/QZFZ32519334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4850aa7fa0ec0d3fd5bef278b32c000b25b748f4615b2277c0d58ead1992b0f. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFZ32519336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb56937ab149d65b9217b160583d9eefdec4518ba7a1ea27ac95329e819139. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZK6L2596764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b76bbee5293fc79f56758f2e12da874770cc1fdbb92c5e7a6cd64d452bce93. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:14Z), 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/QZRP52509385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06e8bc70bf95a4e500057e96e5150a5c4c8857ce7ed0895fc7d4b37b92d9d82. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFE2571396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b57c15d8a0bbe32da89a5a1fd6aa7ac6ba0530e15cf39988922272a14f75171. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ782585022.