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 0x735a9765d17b535a80f51a383c6a7722b22567a9b2a9a53e98f102395e33a9fc. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f66095db-c107-4bf0-b2ff-0ec3e91716a0.json and https://artists.proofprofile.net/proofs/artist/f66095db-c107-4bf0-b2ff-0ec3e91716a0.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 0xd21a65619f7c55769356fdb29de76d2ecd56b84da3700f18544895940a04e3a3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR2X41907461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd789bef5eaa86ef89aeeb579beb40dc70823a14dc33f19f5452d23d51a5b435. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:25:55Z), 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/FR59R1919836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea264e5437cc0c03658918f8848185d920c083c3e6cd15a27841ebb5f3dbc96. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR59R1919837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0044c605cb47008721c76939c7e4b542232645b325f3b276234933df4e74d363. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR59R1993637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a52e2d2a6ca7cfa2a785701182f13bc6edc3f5050614cf4d9ae66100d488494. 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/FR26V2017289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb197e740b50ce464b3151cb3760bb6f5f9330b50e86a4f90b7a776cbbb9233. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR26V2017291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7da63581cf407d243c60b18c5c3accbfd8b079eb25cf1d0a9ec4b099d5689a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:36:10Z), 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/FR26V2017292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82425363d98c7e8b6d1ecbd2f6d7658f68bbe0a4492bd0ab822d27acd6ab2e6e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR26V2017293.