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 0xd334dc3cf30348e8b8935364653e73c8c4122e3fa91cb70aee9ae5043510e324. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba693fa3-b5c0-4890-b4a4-c6cac4be0811.json and https://artists.proofprofile.net/proofs/artist/ba693fa3-b5c0-4890-b4a4-c6cac4be0811.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Que Mecía la Cuna (Corrido de Genaro García Luna)
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 0xaa3bf27090d0e5c39170176d21d9ccc7f8914a6fbab0dae4239f02838321fa2c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:44Z), 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/USANG2105891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdcc010bcd6cd313277b8217761cdd8cddc3c989f6b2b33906726e3bdf8e186. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:36Z), 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/USDY42046588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d77439953128514e371f86ecab0a4be24807898cd248e9f474ccb4d11a8022b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USANG2105993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c5243c20a15d91a96b6404ef0132b55a3c6172e480ddc810577e710d07510d. 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/QM3DF2161169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92da7d3d7dcca46255d98fb127254b5eb461e927f09fc9f96b3a8642754672f. 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/US3DF2232831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c1f695e3d28b5905964839890c0a1c3aff0fa7571c17cfb426271d9d682d76. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:31Z), 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/QT3F62568359.