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 0xf3e748238636b7f12d62cb6c4e668dff14059093401aad769df98f053f67d9e1. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b31893b-f6e6-4439-b1e5-542b8ffb8c7a.json and https://artists.proofprofile.net/proofs/artist/4b31893b-f6e6-4439-b1e5-542b8ffb8c7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xefff5b50602a1310c24b46bc0a18e94d81d7be3b71f2302590e9d917aed4ce55. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUXN22341316.
Ken Colyer Very Very Live At The 100 Club
A Boston Concert With Ken Colyer's Jazzmen
More Of The Lost 1954 Royal Festival Hall Tapes
New Orleans to London and Back to the Delta - Classic Recordings from 1953 / 54
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc675c9a00cf321e662eda2cbdcb1fea10bd07757573073ad8fde41fc3c98c433. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/GBBAD0500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e1d621867c037408048fb8395f6ba7093264f768fca31d44bc1804b9324be6. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:08:19Z), 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/GBBAD0500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f2a4344fcfcaf8446d86db86cb47f40b91d67696511ecaab43e5e54fc579ce. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:21:40Z), 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/GBBAD0500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2944b0c305f5ae02012c4edab0bf4b54503510bf47e931f628acf9a9c24387. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBBAD0500025.
Memories... A Jazz Club Session with Ken Colyer's Jazzmen: the Allan Gilmour Tapes
Memories... A Jazz Club Session with Ken Colyer's Jazzmen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2e34f89816daf1b72be5da12fc559b3f09a0a418a5ce6b9e9d6229b5826490. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GB8XC1433515.
Live: Rediscovered Treasures from the Classic Years
Watch That Dirty Tone of Yours...There Are Ladies Present !
Ken Colyer's Jazzman Live at Manchester Free Trade Hall 1959