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 0x063cf06092fa7e337b9805782bb11efd3705610cac6219a27812fb2221cb024e. 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/18cefa27-3395-4473-b4f0-89b6b793e976.json and https://artists.proofprofile.net/proofs/artist/18cefa27-3395-4473-b4f0-89b6b793e976.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 0xdcdf63adb34bdb30825b444ed21c9e9e8600591f9990908de8deecdcd7a70f4e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:00:37Z), 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/TCAGZ2383227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958134c59b60dc3b2ac40a9b7d5dd7be4fd525bed052b6460a7563314c01b91e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAHU2424652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84fc6b57ca60837d7d053d03936d7955eebdbdd10eda6fd7129a15ec2725d92. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:33:05Z), 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/TCAHH2344295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed30bb035b058bf3434fd34f49eacba85d0079f0281222036d653a5a74d97be. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAHG2372132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254e512537f1862b948a1ea72f5a21e489608bfc7d2b03ccfe91d7f31ceb91c4. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAHY2488607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5529f0ce921fd57febd4de35598ea50328d4d903cef25ae43da64814d37eb23. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:03Z), 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/TCAHY2496594.