thumb|Noble Sissle photo taken by Carl Van Vechten, 1951 Noble Lee Sissle (July 10, 1889 – December 17, 1975) was an American jazz composer, lyricist, bandleader, singer, and playwright, best known f
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 0x679b6cbaf63d7f41ddf3a50f3210d7f2fee9bbd662d2f0f130ec2d1cc2764d9d. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/946cb5c7-872d-4df7-9685-00432c3ae25b.json and https://artists.proofprofile.net/proofs/artist/946cb5c7-872d-4df7-9685-00432c3ae25b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sissle & Blake Early Rare Recordings, Vol. 1
Sissle & Blake Early Rare Recordings Volume 1
Really the Blues?: A Blues History (1893-1959), Vol. 1 (1893-1929)
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 0xb2a7c7b4cd19b547191f49293fe3b5b0ec0d03223670c5ff413681c9c9336408. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USA4A0901035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de014ade721c216a34f30048e2566fa16bb99ae3ebdcd64bfea9a5a87a29dde. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLB151200128.
The Big Broadcast, Volume 5: Jazz and Popular Music of the 1920s and 1930s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe955bc2812df1863721ca72a6d4b8793aee766837db97ae7a75a2afbcc77de26. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USV351311342.