Carl Charles Fontana (July 18, 1928 – October 9, 2003) was an American jazz trombonist. After working in the big bands of Woody Herman, Lionel Hampton, and Stan Kenton, he devoted most of his career t
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 0xe72e7f13f8c05c8874743d5a0387ef9655fbe4bb217be473ce34eafe3e8c54a6. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec4fa808-b74e-47b1-8819-8b0b52e25d79.json and https://artists.proofprofile.net/proofs/artist/ec4fa808-b74e-47b1-8819-8b0b52e25d79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The World's Greatest Jazz Band Plays Cole Porter and Rodgers and Hart
Plays George Gershwin and Rodgers and Hart
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 0x26f5d520465bcf13f92ef44b70079ad810735e6aad7723b07ad7e0be2573b37e. 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/USA371219124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c631dbf29e1384f886d6fbc01d039980757a05680dd903f255438f74d51d92. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA371219127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dda36e9271995891cfabc19ea75d63b41e7e84840e3ca73341809e47149516. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HUA150601501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bd96b3f3e5534b38c9cd328e2dce87f1c5cc1758d73b162fa2f5492b14cbc3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HUA150601502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9559be28a71e9189a509f3e2398a6d7b8fa7fbeb7a7cdbdd75c7d2026b6a23be. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HUA150601503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b20b097c56038e51c6ab30e921f24f6ae401fca83da047c3c8352ccdda0993b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUA150601505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba64b3845de0df13a3a5c83367dfffeedaabd5ea55d2cb966fd70ce70c6fc06a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUA150601509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bd65021423d347a57345b6d1e1b1954aef9513194bec682b3c89af8ac5bc98. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HUA150601504.
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 0x2a72d93ce6cdae09abceab186875f3d567f9379756fb552a41eb60f5472740e7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HUA150601506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c71defc4f0353a9ec42b558af32dfae7d29a69c9eb3b4f378ae57ca8869c07a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HUA150601507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f30a7ac9f8636dd320fe4c057a3a771dacc984fd912f92bf20e4c28e4ad20ce. 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/HUA150601508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e2a30a27beb58e34c5f9c708ad738bc2bf294127100f771b97b5533629d847. 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/US9930610413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83841cbc2e7cdd0396ace9994a13582e866b40d97643b699aa30fc043400ae97. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US9930610410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e283a6b91ca543d6785b8e3182cfabab437c06da81ab21db9eaba404d68c4ee. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US9930610411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb135fd2f8e63e92d1b20007c940d54e6c770f4bef4f13ac1026556866db9f09d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US9930610412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6522d2fdc64f86506769328427c2afceb67bc2a16dafb543828fb2dbbc74d11. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US9930610415.
Live At Concord (Live At The Concord Summer Festival At The Concord Pavilion, Concord, CA)
Max Is the Factor: Max Bennett & Friends