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 0x190040e84ce48883e033462046b77ec0391aefb93b359753ba49b2f091f858b0. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c751d54-e7be-47c1-b467-89e62c589b7c.json and https://artists.proofprofile.net/proofs/artist/2c751d54-e7be-47c1-b467-89e62c589b7c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
20 Grandes Éxitos de la Canción Mexicana, Vol. 1
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 0xebfe641d91230f8e99735318b01a896e637adaa5b7da6c18183b192ade798477. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:38:00Z), 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/MXF550601299.
20 Grandes Éxitos de la Canción Mexicana, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92d023e3512cc15e1a2c1af87a05ecb6b62b365fb4984a07203b3b3662496d1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:03:05Z), 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/CA5KR2145875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac909782cdbcccf9553a32d64317b23d61702447e4726a9f365e3897a7dd27. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CA5KR2145878.