1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x6522e4ff1fb5a83910479afde8ee9653c8b769f0fc5fa5f5212ef0722ddb2e06. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90912271-31f3-4926-bbec-c6fa1e9730be.json and https://artists.proofprofile.net/proofs/artist/90912271-31f3-4926-bbec-c6fa1e9730be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Straight out of Public Housing 2 (Reloaded)
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 → block OTSBitcoinBlock must exist at that height 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 0xe36d4eeaaf5422dd94c9a449f5e67b271d4171acd2f930c1f5e5a4c282ad939b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFK2161227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ee153860884ea02a643ca1d2d8227b4074c23455e720967cd1ae2fd7738668. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAEX2067984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd5cc4c79986b9b263779a90179fbfd434f328ed8f40fe27417fd58a1aa120d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEX2067988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c33f394713996a0a13b67d3a67735cd61580a236f1cdfbe07ac90885ca74bad. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAEX2067994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02690a7c708368bb02564005a0b18566ff1c590ec789834930a8e2f261e2c8e1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAEX2068000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cab02cb32c2994b3334e94146e87bf92b6c0905756a2870f1e3d8e8b78e9ad3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCADU1865067.