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 0xb718bc3c75ccf02846768328b7a671b0080b85bf700923be55bd0960476166d1. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d76e61bc-af46-4449-9c33-7958f714db7b.json and https://artists.proofprofile.net/proofs/artist/d76e61bc-af46-4449-9c33-7958f714db7b.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 0x599ec4121d1ff0c2fc9c6844ab7deee5f6706aae7eeebffe1e4d08af047f0cf9. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:49:36Z), 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/GX89G2324850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c9021986234321ad36de5a4e112bd371586e53348e0e60ad7e36c0a6950859. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:33:33Z), 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/GX89G2391741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677f4b029dcd23ba62015bb07095c37e4158e24078a3a8f13a8debff5e40db56. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GX89G2342362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cd7cb95c0d1f14c5feb01fa75b84357f11bedcc7417ad6b38948c2fee3578e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GX89G2328089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdd1ff9908f1db3bf02a6cd9d3f69a5bcd0e69a404370a9587ac2a02bbac64d. 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/GX89G2384624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82458fb1917adf62d955781bd63bae860e21aab6ef3ff36a69580ce0f31717b7. 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/GX89G2309727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5e40b612c69721166d272a654340f387f46a2650cdb62cde56233e868ca3db. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX89G2313063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32c5853cf6e8587ddf266f2829cc5d224994b9319c74601d48d491f50e87fb3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GX89G2333846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0dd33c7abde203113ddcfb08e3b21426b51c8ecf217c8bb86ee99f5c46da35. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:38Z), 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/GX89G2344125.