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 0x82720261ae50e470cbbc5b9907c23f63be319376c40751a2362bfc631ea257ed. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e9a41e9-1abe-482c-b9f7-555bdaaae247.json and https://artists.proofprofile.net/proofs/artist/0e9a41e9-1abe-482c-b9f7-555bdaaae247.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 0x255f86edc9ee60696a4b22373918576d6680dc63965f90c1ba4699ca592f89de. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:05Z), 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/TCAGX2364603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fb011640c173e0bad05a1d6b9f3c9dcdda5c472e3d4b744712f984ebf1a3ca. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAJF2586394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ec416e842adaef44c4fa3af4a8d53cd230b924951bf97993dd3cc014e34595. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:53:14Z), 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/TCAJF2586457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026e48da77e6e83fda5e9627aebd29084b7758496be2c6efc7dfb9e32430acca. 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/TCAJF2586509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ba2fd67ab7a929c08e360476d82caceb4de4b1fe0333c8736e87040cf7753c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:01Z), 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/TCAJF2586600.