thumb|250px|Namysłowski in 2007 Zbigniew Jacek Namysłowski (9 September 1939 – 7 February 2022) was a Polish jazz alto saxophonist, flautist, cellist, trombonist, pianist and composer. Life and caree
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 0x66ed3d05aa307b283b83f41889e77b9c585812ff7d26213299cb6f6b9b7389d4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf0f262f-65fb-4d3e-9414-8b0c5126c5b4.json and https://artists.proofprofile.net/proofs/artist/cf0f262f-65fb-4d3e-9414-8b0c5126c5b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zbigniew Namyslowski Quartet (Polish Jazz)
Winobranie / Jak nie ma szmalu to jest laź
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 0x22c83aa8462898dbc0a6086cbb17514b040b76302769525777b709c1dc5cf725. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:42:46Z), 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/PLA247316660.
Kujaviak Goes Funky (Polish Jazz vol. 46)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f87690f34bd769ec9a1283e921ca4ce610ed6999b2f5eb3dfa72527e312310f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PLA248728540.
Polish Radio Jazz Archives, Vol.36, Zbigniew Namysłowski Radio Sessions 1974-1995