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 0xe2f8f323aa7c94b00853f43c301e0751fb241a3c2128a213d8a45cc27ab5a704. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66ae84cf-67ad-4286-8c75-b19a1c83743d.json and https://artists.proofprofile.net/proofs/artist/66ae84cf-67ad-4286-8c75-b19a1c83743d.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 0x9129f5dd15bdebeca550d17cbef41ef8150afee1b81ff95cf71e6143d0f04f31. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AEA0D1892129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e88a090d8c337b212c4d00b2c09f6ed4adaa362ccb9ab282da51970a1ed6249. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:10:29Z), 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/AEA0D1892136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296d2e713a6b797f70b660a86fdc862fcd150aca93d67d4643e8c8a036966969. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHZ52148864.
Diferente / Sabrosona / Que Tiene Mi Negra / En la Playa / Mujer Bonita / Candela
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581c237475576bb6307c9dc9e1390a097bedf99e069e309b2dbc8a5242a1e06f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ5AB2299734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e60a2f02f609d4c51bb0ed6aff0f0d53ad823f3c53ed7fb8a70403ac3d67801. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:50Z), 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/US7VG2445225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7dcb9f963a10fe7a42df443c73aa645dd367ae3dbab5e493e7278e6b5b77f9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US7VG2445232.