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 0x00b6f8722ab11afc958c48c87f683bdce1e39f90b10d060b5b867c0f8eb3b043. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9cb5034-e4a2-4cb7-a7a2-98bbc3fbaf08.json and https://artists.proofprofile.net/proofs/artist/b9cb5034-e4a2-4cb7-a7a2-98bbc3fbaf08.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 0x2b661d512c5f93513cdb70c92d4ab686fc08cf34da147989910e9709674473bb. 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/TCAGQ2205812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb168dd077377c755d9119e0f2ef5e70cb61011466142385aa4386e25ead82e4. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:19:31Z), 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/TCAGQ2205348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064758c50a32d39a134b7ec70ab58e2b4cbd52a51e6ff4587345cde3a9c75e9e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:15Z), 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/TCAGQ2205199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3d1a3d7539a217eec1b073c046e385094767ee92639ebd7e23d10d95c7c084. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:41:54Z), 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/TCAGQ2211769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf140238875b59974dceaacc9c3261f20bb7c257baabb9d48490a1a768372a0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGQ2211259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82455cef6adb822e98c42827f06b083e019c17e1cbbc5dd292701d1535a004e4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAGQ2206017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717730ab81c957e2017f0bbd30cc13d49f9aae7b63693f526fcf8b402199deed. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:21Z), 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/TCAGQ2211196.