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 0x0fa45b510d29f6d56597ac444481b677acd055690b2351f4108f8aee909ed1f8. 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/55f8037a-4c4d-4200-b6e5-185c7f7ad551.json and https://artists.proofprofile.net/proofs/artist/55f8037a-4c4d-4200-b6e5-185c7f7ad551.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 0x27ec42f4de9b4622a379152dbca101b2efe9d967e2ce1d1ce3be49f4b356c92a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU3242431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95133d0dc3827ae2bd33a55c8ae7afc69316cd46fe044af9f2cc69d23c021684. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:07Z), 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/GBSMU2768529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06257073ca4cafc0bcc196204c91df553850d829173852f44e9823bd4402807. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:01:11Z), 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/TCACS1631897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bb0f323c6e7839263290e1e7a74ab1546688220376e2ec6e9356c938742069. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:42Z), 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/FR9W11827883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40fe4312501ffdf147d0af5a3412594cbe7ee89827f594a2b7ff7ac4b4a2668. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR9W12011691.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282d7ea4c3b86f7e50158eb89a49bf043782cc8c14790ee808f9e181b11ad762. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W11717785.