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 0x08a3b67230a3728e08a50aa6c50f09ee3ede717f9f98bacf37bf95ca75aa6722. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcb5bcfa-cd3e-4a3b-a345-3fa5a1327d58.json and https://artists.proofprofile.net/proofs/artist/fcb5bcfa-cd3e-4a3b-a345-3fa5a1327d58.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 0x7d6fefbd40160769f9745c178d036bca7af80249ea84aea709afc8c608b60c54. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QM6N22488752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dec9726208a0a1c42e2734f0a39d45098bbf6dd17a0465ef2b24141602bd5c. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QM7282494186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6af9da7183e3443adb63130d1fe7dd85d58bdcdc40251ff9e520dd7e564558b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:51Z), 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/QMBZ92412083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a03f767f5579e5246139fc975d37fa65a4aab46cb68042343de4c90b91e4d8. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QMDA62412923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca4baf9e071b263f838bdfd2013721a8e3bc858b3121d6197080905893abc9a. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:14Z), 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/QMFME2429909.
Mozart vs Beethoven (Turkish March vs Für Elise Hardtsyle)
Rossini Hardstyle (william tell overture)