Kalmen Opperman (December 8, 1919 – June 18, 2010) was an American clarinetist. He was a performer, teacher, conductor, mouthpiece and barrel maker, composer, and writer of numerous clarinet studies.
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 0xecc914a5f99b003a398366b9485564342b0c584e9ff57fd0572df2ea071103fd. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17c0d20f-71db-4ea0-bea9-7d572904898d.json and https://artists.proofprofile.net/proofs/artist/17c0d20f-71db-4ea0-bea9-7d572904898d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Meditation on "My Shepherd Will Supply My Need"
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 0x7ea6f3b8e4e4252470fed8beee27eec0578e173cb9660a449a1dd463f3fe13aa. 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/USBC19300639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da96994e200368f0319ab3aec1f1d33aeaa9ca39ef248a78871a962b1227123. 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/USBC19300641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062bbb87ba211b516deed4038a591103b768be864bdefc0db7fcadab9cdab5a9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USBC19300642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4668edaa7e8427de94cede72b0fac4e16ea08ff4c9cb41aa30fefc7c5ffd7f. 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/USBC19704265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca5079267ab1c7add475e1b08d7b4ffc2dae53bbf776dcc7165c61da8482e05. 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/USBC19300573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f725ac2ba041e337586da7dc85647c7947b5656bb493903b7db6ff77748188. 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/USBC19300648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290857b20f0da17f57449cbc736df92047a53f4f15823a6dad807b8df5463fb9. 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/USBC19300649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4456af975718bccf820a6e3ec636fcd7ae24976d5be68bda638951bfd6140554. 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/USBC19300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cc7dd04db94af221143a79ca543b7622ed94efe1004b869ccfc852ff0c749d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USBC19300640.
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 0x011f15ab43cebd36a323fc349ef09eea9444aed9d12d4de9ccbd19e9581c2629. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USBC19300643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0fd76f2e4dd6cc3a21822696e2124b03b7b74379b2bd82e15a242cb0789c24. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USBC19300644.
Flute Sonata in E-Flat Major, BWV 1031: II. Siciliano (Transcribed for Clarinet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06848f9400e201f967adb64349d6ff725f9c76944b50eda109083b7d6bbef3b7. 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/USBC19300645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417dea5f7f3d3d699d9e47be05b2575024ac853957f5ef361e9a125494873942. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USBC19300646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a0d0c6b16cd15424de42506f8b62a579d716ad34a8ce7506d040b8ca90f977. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USBC19300647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160f6bd780d53ecf50d4a8ce7c7e9472dd1076f748f709716a350c9d625cfa79. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USBC19704812.