thumb|right|300px|Joep Franssens Joep Franssens (born 13 January 1955) is a Dutch composer. Work Joep Franssens studied piano in Groningen and composition in the Hague and Rotterdam with composer Lou
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 0x68d88696d5461308fde97869790411e331f130a1db939945d75c2a9ac0589014. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/677ef2a0-07d7-4ed2-8510-0fc0d56189fa.json and https://artists.proofprofile.net/proofs/artist/677ef2a0-07d7-4ed2-8510-0fc0d56189fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Harmony of the Spheres: III. Third Movement II
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 0x6518ddf50f062f78f5b8166dbff934bccc61e263e2145182882a434e342aa9ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFMG1544173.
Harmony of the Spheres: IV. Fourth Movement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a7b340811318762a236b3f4792e6a98f2c1f4ddd66ef86c4ccbbd63427bff3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFMG1544174.
Harmony of the Spheres: I. First Movement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ec794d4bc47c35faf92b03a8df5e2198b1ebe42e7d838fa0c30b6d012c3825. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QMFMG1544170.
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
Harmony of the Spheres: II. Second Movement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bf607d1153474d34cdfdad04ca9a67b2835401f0f77ec71a101c91f03ba15b. 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/QMFMG1544171.
Harmony of the Spheres: III. Third Movement I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2934b8c5782e900f40e8d36cfe8b0f67497b2e0d7ac75dd64279d1bfc1ba7c42. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QMFMG1544172.
Harmony of the Spheres: V. Fifth Movement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85764338f4316bfbbecac9e3357a24c0a2ebb488d98b41151bd3070f7af050b. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QMFMG1544175.
Franssens: Journey Under Brilliant Skies, Three Etudes, Old Songs, New Songs
Franssens: Piano Works - The Gift of Song / Winter Child
Franssens: Roaring Rotterdam / Harmony of the Spheres - part I / Magnificat
Dwaallicht / Taking the Waters / Winter Child