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 0x4ebecfd8b78f6afe2c2c6b87abac3713090f4051858b15540a27a4560f1190e9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96268e89-b876-4ea4-97a1-2dd974d9d1a8.json and https://artists.proofprofile.net/proofs/artist/96268e89-b876-4ea4-97a1-2dd974d9d1a8.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 0x4a5e5acdfb83c076ad66bbbb1758d2ab57e34955e3f7104a08b64cf6ac435eff. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:49:38Z), 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/USHM92091624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b09f75551f1838607136445aed53b966b0b66325742e6fb18364da716e979c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ1892519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80721cbc22a218d9311f9335b2430b84026fe1636644732956a6748917f487cd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:56Z), 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/USCGJ1892520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0e71186ac4d8c659f52c48a4566c7aa92430bc31bb8134537dd5413c64178a. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USCGJ1892521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bde8718d8487865479c8c76f1c76305caa970a07e69dbe01ae8b40d11569d2b. 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/USCGJ1892522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbfeb902cbf720a3643373b8225d47966a020702736a50e1e2cd8af455fbd3d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:49:42Z), 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/USCGJ1892523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de5588282d947fd1a75c2955b2d22d1b5169a324d4e905086b0fa7b07f76c35. 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/USHM82175642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1152ee777ee9bb84bd488b5202bc3e46c445f2d06cbf35b792eaae2e1100ae. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM82175644.