Jeff Stanley Coffin (born August 5, 1965) is an American saxophonist, composer, and educator. He is a three-time Grammy Award winner as a member of Bela Fleck and the Flecktones, with whom he performe
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 0xfc54348614007705d4234501b21589b950f337f9e0eee15f6b7108862209b678. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/893aec21-17be-4c58-9a19-73c6fe727eed.json and https://artists.proofprofile.net/proofs/artist/893aec21-17be-4c58-9a19-73c6fe727eed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xeffd00ab248fc32a47bb052b7ec9e4261b30a3ff9bfb303d8eb1815dfeef3072. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM91661679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43ac9dfaa7a6a9d35c44797042ce5ba519e2089e4794792f6734bad35d7e29f. 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/USHM91661680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef3b7240091da0014a6371f336cef5c5116630b18e0124a8ecf453c2dbd479b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USHM91661681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fd3fa67047b8bf9eefd86f8704fbfdeb1327483a29f84bc392d29cac034702. 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/USHM91661682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981545e5b169050e81a08b5b1c74e9edf130a7dd65a1d1064c748bc7a3699443. 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/USHM91661683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90e525a5d54344264b9f2c8cdad2fab8c04b18a53905834401562dda653cca0. 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/USHM91661684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde6e18f20fa052d717aa548ac8e455aacfed007a98f43c4bc6b513a8fe42193. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USHM91661685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2248f4809f5c5c151caea6750145d364735f37b074df5b6a84967a0fb729bafa. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHM91661686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd963ac8416a55fa71108c4ca65ddb286ddd3ed87d550f1294d94d74e80115dae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM91661687.
Shout It Out! Spirit Music... (Live! at the Jazz Workshop)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c17fc46a449e26c6b92a17a95c9e805262f2ca52ba16437f5779ac470a90b4e. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QM9AA2027257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd512f405a2e2705e987d761eb233a7ad1b183b01ba8f9c64789353f6fc4fb01. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMEU32303284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbc63f72378efebbf6894c3d2c4eea01b647e1dec9d435e3ab7ef4df19ea132. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMEU32406345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde840018fa0523263b7639df93756426d573713ce852a405325537854f5cdb03. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMEU32406346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe20256948bc3e8977c177a13cdc29af53b70a544b79840d8588d8fa868a88f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMEU32406347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1e842ae763e6651fa8425b136ed2e647b70a2910bfd7ddea3ca2244546ae93. 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/QMEU32406348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae9924e180206205f226ce68a6ec7c311206977b2abb8e78854e0ea70d1b96c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QMEU32406349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28aaad9be247f729dc57a120e3007f1c448c1feff515fe966fa452a99d8e640. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QMEU32406350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5bf06c4e59be21118e3a250e9aeeb7a4e0eb795320b7ffc74dd61214aead2b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMEU32406351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8002d45e1ba4062d9621e064494d0c9bb0573ed1a393fda515ec43c8f056e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMEU32406352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4a6f4eaf15f8a062ea222deede622f31bcc2b35cd75e1301dcacc1360a65ce. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QMEU32502258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcff786c8c1c5fbc5ae09c643977797f4db5156faa533292fa8fca6f1005d09. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QMEU32502259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8448886de1777dae5fe816b63f8e23ce95f1db748822b54bfcf4633d9b758f5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QMEU32502260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf429916b9a8cb0ac419fbbc73b3867ba8fe7001c63d1aacd9d2b074059053b64. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMEU32502261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a206827cf2d1dd1e3b12dbb8742a7cb5c1f3d302df2806833b14cddb56782d7. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QMEU32502262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c0923a9276d2efbc913b49ade869e513647c72f6d71d81bfb69049858d46a5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2P1951078.
Let's Dance (with Huey Lewis & The News)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0907c946f882740a1c38affaf123dd237df77a37445c16ad624fa87b6547a061. 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/QZZEB2350850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3576403cd9b769d6ad6010ef72198aab29d38ea8b41ea10b95d30e24e8dec4e0. 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/QZTDU2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72dd41b971227b8bb9e47315584a40410a63ca275986d20fcd9bc3a852b23b6. 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/USB8U1705804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc11384e303e99e82c9e6565d7f9489d9374ea4b29728c64fcd4f7a35d966aa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USAPX2200003.