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 0xf8da2267fb39ca7d8e49cc16d38f48a690b0ebfe671094d6f01608ff00e796c8. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebc2ddf9-5d37-4232-9745-f430259d2b3b.json and https://artists.proofprofile.net/proofs/artist/ebc2ddf9-5d37-4232-9745-f430259d2b3b.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 0xc37aac6b7b7c2a1a62a841a9ee93d67594475e79cde51dca47ff9c7dd9476a18. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GXBAV2063781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5d79df5cd59ac4f310d6107d853840a56528c8330ecaa5d9aaf6b4e1e0fa27. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXBAV2066351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865cc3c5614815c7b03eca99f0ea1a0e6dc93b592f069480292d836f0063f032. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:58:08Z), 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/GXBAV2027042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1263bfe0d841cd5332720ff0d32e8c1501e5e6ff3850897144497dc9f8756e4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:05:04Z), 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/GXBAV2017038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b36674ba0fe9587d637c9804b99d5972bc6934b98ef87fd7b2a2e44777c611c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:16:54Z), 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/GXBAV2020981.