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 0x16dc169beb4cbae37826cb85d5c4f9ef822543e5f35b0277fb15ae9bc0403cd2. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ae2eb9b-d51b-414c-92cb-ea3f425df097.json and https://artists.proofprofile.net/proofs/artist/1ae2eb9b-d51b-414c-92cb-ea3f425df097.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 0x5191b67dda45203da647311203534be0195e15889b5db4bbe10b4c2ecbff951a. 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/FR59R1610661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba90fcf1a477409fc20daf0314706e2ec7884512b294c8e8136228488bf0c8a. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/FR59R1611065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eeea888c2e54f00da70bf7e9b583dfcc391a7cd4c7fdf36ee4f83b2d5bb9e29. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:21:03Z), 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/RUA7C1908350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870a181680a0d7fca6ae78b44a5157b5a033347407d4d2ec80a2008122659756. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:44Z), 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/FR59R1610662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca40aa11cd65d340a3e73427b3a41e8e2d9a2562255a04b207843cc50db44c7b. 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/RUA7C1908373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91be023638a0e7384a1ac0127dcf846928adaa1f8d19621fd2cadda7995d9d89. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:25Z), 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/RUA7C1904091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ab8af181bcc94012a80084b2796fd81c5db3dc846470fee2f9f4a53c1355fe. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/RUA7C1909584.