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 0x6ec1971bd6446178500a2baac5c66c098d40f0022d2e9b7673d5b8d041ec9b61. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7299d62e-1a1c-40f6-af99-598825081179.json and https://artists.proofprofile.net/proofs/artist/7299d62e-1a1c-40f6-af99-598825081179.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cuatro Viejas de Ferrusquilla y Seis Nuevas
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 0x3efb9c332cb621ab3156cbc5d442ba196dac4e780e016ae9b2a86209b7553316. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXF017800230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5046be95c2f826242266d7c71afa5f5c044dd6249bc6aa24fabc92645bf68bcd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF017800932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6bebcb92ac408b848de7c1fa7a375c94bfbf93a5aa8da6603636fdd321241. 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/MXF017800930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea4bf5034dfe8c734879a32082aec5630e6052fb883d53ce3b0762a7cdf7514. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:34:59Z), 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/MXF017800933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc188c9e0cf24816ce88971bf66b4b2aa56c18cee9a67626fbc55fae6ea42974. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/MXF018000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe32b1b5b0f2ac4c01bbe2343d0e2597b306b97773a671f05ebfef9f4666e259. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/MXF018000249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4083d5bb8f84229c755ca5cb68c5bbefba38047a35080b1035d0ec3709c820de. 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/MXF018000251.