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 0x54866736893fce3ec4b642830f823901dd13980d0535ba92334326477c4c0d6e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ceaf1f89-6b7f-4289-b1d0-479503a555be.json and https://artists.proofprofile.net/proofs/artist/ceaf1f89-6b7f-4289-b1d0-479503a555be.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 0x719377c5c569cb702ae4b6cd253e8d9d704fda5ffd083a95161730aed6707d45. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PYB401800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487f85c1994d3f79460577d0efec8f78ba369823582c138ec7a6114a7b5f62f3. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:32:01Z), 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/PYB401800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323281f88e3f1978503c7d743bd2952618c30c52d6f5b3535c8a03f31ab71eeb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PYB401800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654f7b784bb7c5fae3e3ef2b7bac6eb1685efa1d9dd783ff585c680b461d2054. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLFP1565246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f64d914a78ac30165888317016a4f4edc58f313127c44875767adb03f937428. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GBLFP1565282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f5cd630d470394082536e9bd2c5e225a691cdcb14bc0c996fe7e187038ea0d. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/GBLFP1565312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabe5db700a924007b7fd40ba918fd5c54140ef8bb01bee8d7d49300248f68c6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:18Z), 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/GBLFP1565283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992242f500cf36063d80f3640b84178cf5faad6d337970ceb4da8e85a6d1de2c. 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/PYC842503542.