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 0xa338e8c23792160b926e66ad0eed108d00ff41ce810ee99f7cc3696c2678284c. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bceec20-0a4f-4556-ba25-a5853b50cf4c.json and https://artists.proofprofile.net/proofs/artist/1bceec20-0a4f-4556-ba25-a5853b50cf4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jeff Hamilton Trio: Best Things Happen (The)
Jeff Hamilton Trio: From Studio 4, Cologne, Germany
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 0xa9861f4c86dae5dd733738a94c6173a322bd22ecd52bd472c0a650f446514e21. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:02:54Z), 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/DEE289881206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b99dc3ad53448a1bb13a80c79fd9ec942fe37677751775fd7208f97922ac2a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:12:19Z), 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/DEE289779401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d0b1a969cf5ee2c47935eb30e26dfe2bcc86bfb0d5b13649d64b32b01ebe94. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USFBR1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3823520f253229636a2df0128f88d205704d27a39bd167d35fcbefd2d59e7a13. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/USFBR1814703.