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 0x7409065251b32caff6663885b481f07b2731019947b4d3ec1b8fb59ba395d359. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f04859b9-b9ab-431d-8766-e91407540ea4.json and https://artists.proofprofile.net/proofs/artist/f04859b9-b9ab-431d-8766-e91407540ea4.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 0x4714fbbfecab0d9fa4270998a134f6c37c091617a8c191aacfb7037e881af13d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:05:22Z), 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/FRS182017356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd06158ad2d17e08b43d59c1f0894cb745f048ef715ebab61cac1377a00df73a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:46:59Z), 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/FRS182017358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88d3513634582c68b850cf26500ee1e921f7813c6569c6654b567f7686a2f67. 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/FRS182017361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8d8b17acdd0d0ff2ff9877556b3ce18b17c61e88a66b8b45e91e81f6838465. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRS182017365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56bb099e0df28ef9e13afc455dcd9106a14c07ff77868f31ac30e5c35cde873. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:08Z), 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/FRS182017367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e07ae343c41ebb33c718b16ca3ddefb82968d0829b945569c26e2c29bcbeff. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/FR2X42201878.