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 0x25d3559a1c43f661240b4f92da1659d85bd040c9839b3018e7b9f7333a699131. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43ec1aab-8f80-43d1-ad1c-f5cb45e1ceb7.json and https://artists.proofprofile.net/proofs/artist/43ec1aab-8f80-43d1-ad1c-f5cb45e1ceb7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sanjuanitos Cayambeños para Todo el Ecuador, Vol. 4
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 0x21e9886a210351edf076bf6562404c0e5263dc3e1159d05ee994ef1ab3ffef60. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGJ2254988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb287ac0ea7e22918dd9cdbd306f33870deeb2dcc6671d947c50229a52dbf50c5. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USCGJ2254992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d6b15e0c44537c027039ba27f40055d058a4c14b7b164829230afc9568fbde. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USCGJ2200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90672ee6145c6d4d58eb34c40ff6513b5fa10de1981ac23af7c6d669a8e5af37. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:31:27Z), 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/USCGJ2200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479a98424c654fda64d87324e39940eb3d93e861231a478aa110e226addb11ec. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USCGJ2200120.
Mix Cumbia Sabrosa: Caprichoso por Tu Traición / Juanita Donde Te Fuiste