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 0x6bb1fa5b5843b42a69ccd8260d50e6b42ad82ef0326879e76314a2d38426bd35. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d48e6b7-b37d-47b7-8dee-1538e23aa068.json and https://artists.proofprofile.net/proofs/artist/0d48e6b7-b37d-47b7-8dee-1538e23aa068.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Andy Kirk And His Twelve Clouds Of Joy Selected Hits Vol. 1
Andy Kirk And His Twelve Clouds Of Joy Selected Hits Vol. 6
Andy Kirk And His Twelve Clouds Of Joy Selected Hits Vol. 3
Andy Kirk And His Twelve Clouds Of Joy Selected Hits Vol. 4
Andy Kirk And His Twelve Clouds Of Joy Selected Hits Vol. 5
Andy Kirk And His Twelve Clouds Of Joy Selected Hits Vol. 2
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites Volume 4
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites Volume 3
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites Volume 5
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites Volume 6
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites Volume 2
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites Volume 8
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites Volume 1
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites Volume 7
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites, Vol. 4
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites, Vol. 3
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites, Vol. 1
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites, Vol. 2
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites, Vol. 5
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites, Vol. 6
Andy Kirk and His Twelve Clouds Of Joy Selected Favorites, Vol. 7
Shades of Jazz (Andy Kirk & His Twelve Clouds of Joy)
Shades of Jazz (Andy Kirk & His Twelve Clouds of Joy, Vol. 2)
ANDY KIRK & HIS TWELVE CLOUDS OF JOY - THE GREATEST HITS (앤디 커크 12 클라우즈 오브 조이 히트곡 모음집)
Andy Kirk and His Twelve Clouds of Joy: 1939-1940 (Live)
The Mary Lou Williams Collection 1927-59
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 0x4c5c75cbdce6868c087a0788cd608ccbe03416943c58dcdc51ac70c24acb6248. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBSUW1410603.