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 0xacad909d3d25410a27026456db554bead8a593fc019cf398ec3f4b3df10e36a1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a330528f-6189-4565-8216-fe65b99f8222.json and https://artists.proofprofile.net/proofs/artist/a330528f-6189-4565-8216-fe65b99f8222.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 0x821fda08e1329f7c7ede68974da1598e33d24f2a8f1bb5eb4c9f3062e7c3cce7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:41:48Z), 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/SE6XY2318926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2350b8bb396d2f4745880bfd0176c6fffc74bb90a3be67942aece4b35e969337. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6XW2304645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78272e5beb3bf806712ae673133c9a71d574faa4d4b0ae57f1d4ce5c6a4da2d. 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/SE6QE2382010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e1124af05b66c137049d3059ec3c3f15959c409efbdc88dcfb190d202059d3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE6XW2317216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f90f2cab8cbfb8cb32c3fff8fe8f7318fa882cd7216989c3ad17f7b141e7f34. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:46:38Z), 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/SE6SA2351758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2c31f1e321fb58fbde444ed831c7ab766884568bd7f7e1697c4c9b3f9d6999. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6XY2305984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd45da027513506b921a892be546da65831902c0917f3b96d850b7d83d4fe71. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKZGC2306608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b657a3936416dc0756c356580d2c7a435035de571d592a81060830462515801. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:33:12Z), 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/SE6HN2418895.