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 0x5cb5507d23731e0bcc3ccdee4c0661d20e24d5c801fc4230dee1c5d06acbc460. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2844f0ec-9418-430a-8593-cf31d8583807.json and https://artists.proofprofile.net/proofs/artist/2844f0ec-9418-430a-8593-cf31d8583807.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jazz Hymns: Faith of Our Fathers, Vol. 1 & 2
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 0x93a985fb9a238c203758baf0faa2efc5a7ea4efb6038f89131c737ce7167e6e2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM81126610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1345c0172d13a5cabfc4dceeb0674fb3b0dd5858367296df13c9be46b42708cd. 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/USHM81126614.
Celebrates Christmas: Come Let Us Adore Him
Faith of Our Fathers: Jazz Hymns, Vol. 3 & 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0995f790b63a5f623968d0e6685f87cfa2b2f6be9332b26a1840b3a65f915b7d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:51:43Z), 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/USHM21570884.