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 0xcd6a7b6c889dfada5a7e208374611fd68bcebd2afa15f3d855989d55f8ba89be. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff2fb11e-665a-429a-bef8-78a0a89c9a09.json and https://artists.proofprofile.net/proofs/artist/ff2fb11e-665a-429a-bef8-78a0a89c9a09.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 0x752eb47ba9c839bd9e7b3e7e7757b86c302353f9827ff0e03ab8daa21be174b1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN32144096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a47b91c1a297810e6b4b926c9e38dd3991ae73d2da7bec0e2e658446578917. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHN92165015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f12e961b06f250fdaa325ed6335f1f97606614b05debd243e13abfbb06cb1e1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWQ2118992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dbf9f172c7928ba49a31430b0fdd0b01ca732d8f5eab3a9cbbaf8e766daf70. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6L2236446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a85b4ffcd572b9b39807e80ed585f4c476f96b74550fe9ea24a9785c7a6cde. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:49:52Z), 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/QZHN92211648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeefb02dd4e68724c5bb73bb2b1adebbe110b0b5d8821a98a48686219c9746b5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZES92378585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65710beb6eefa3b8b6eca5ee115d35a071e42833f3ab91cbc8d9377388861457. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:53:55Z), 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/QZHNB2132319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992ea404806fd7ffa350d42fe76e33d9453c9eb461d234cb4a45952ea316b3df. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB92357224.