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 0x19f9c989ecc3cb817747f93a5871c3cdcf0763214f157c395763cbb029591583. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3f789a3-103e-49e2-9628-23c787b5b359.json and https://artists.proofprofile.net/proofs/artist/f3f789a3-103e-49e2-9628-23c787b5b359.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 0x23decfe76354ab87bfef8085314db12e4d8c52177bbc0a57a53d7a1872937b40. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/US7VG1867473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf872d56c740a1a123d4356f06f79d6dadfc3a074e8ab93a0c78ce53d717992b2. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/US7VG1867474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2117a57d62aa1f0a2ef005e6bd2a747e760105a4c47847934b51b2972c72b2d4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:38:59Z), 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/US7VG1867479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26a7db1f330686006a5be532dfe773acf3a8ce502ab9af7dbeefe95020165e5. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:07:38Z), 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/RUA1H1809589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd474d4694e20f3776b3dfbb35cd4163853665b807fcf38d6603d2cd836456c0f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLS2196740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c34615b26b7ee8b0fe24374276ec1107f4f20c0f20e2b56b895be115ac2784. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:51:02Z), 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/QZGLS2196744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41829e1e93046d20b29cd4908a0bbfa54fadedb1b825d1a62e56bc539a11e7a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDY42440221.