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 0x71df48cd27a37193468b983eb757e3806f45dde615183944b25170cf8499f024. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78d65dea-31b4-4e3b-a776-1dcf345b6440.json and https://artists.proofprofile.net/proofs/artist/78d65dea-31b4-4e3b-a776-1dcf345b6440.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 0xcefe96d9150512cced5b5b3369ab033ce71d7297ba76267628855ddd670d1f6c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNMU2430302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768c8cdb44e096677a6b4dedb19c7bde2c8ba79b91a6a2a1a415291b3d7ff8f6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:05:16Z), 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/QZNMV2459720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f27dd569ef28713cb3277c18e28797f195d880daf14f93f8aca149c8377c3f5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZNMV2459721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d9755202a55b659f7a9818d671ab9645184ab503fd45175acfc76eede8f07f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNMV2459722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc2b3655b2b54c731eebeb2e9b83c5ebe431ab2879eee4518f8d05a8089eda4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNMV2459724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef6d9258366b18dce2a4911cc639b532654db12326d29bfcf9b119dc1b544e4. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:47:52Z), 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/QZNMV2459725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d7d5d28d44881c35e200d4219f396c885c89b991f5cd7dc616325fc4d34a3. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZNMV2459728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0697c462fbe027ecf08c9fac8863caeb22733f4e65313aff9d1206a0cfd0c3fb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZJG52586454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dd6a03946015847ea476060c8625f30c87cd452fd9278f3ed30539c66f4e31. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZJG52586456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb10564345a286c282a738fb58e3a505174e5e89be5266f1da09f44aad0b839. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZLL92519117.