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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9904c8a5b3c9d402aae8341ab50323cadaf4ebb99f053b18de4f1344b3b20752. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c6fa181-d900-4b5e-bdbe-56ffaf2398ba.json and https://artists.proofprofile.net/proofs/artist/7c6fa181-d900-4b5e-bdbe-56ffaf2398ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Easy Jazz A Journey Through 50 Jazz Tales, Vol. 2, Pt. 2 (Original Version)
Easy Jazz A Journey Through 50 Jazz Tales, Vol. 1, Pt. 2 (Original Version)
Easy Jazz A Journey Through 50 Jazz Tales, Vol. 2, Pt. 1 (Original Version)
Easy Jazz A Journey Through 50 Jazz Tales, Vol. 1 (Original Version)
Easy Jazz a Journey Through 50 Jazz Tales, Vol 1
Easy Jazz a Journey Through 50 Jazz Tales, Vol. 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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278ded7fcbdab1fcbdc25515389e4a1260961a81ec93d6a50397243edc2a78a1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USX9P2426300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cf75457c1b3889664ee58949a7a4c598800484eaa4484efa51080fe45c4c9a. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/USX9P2451157.