thumb|The Zawinul Syndicate, live in Freiburg, Germany, 2007 The Zawinul Syndicate was a jazz fusion band formed by Austrian keyboardist Joe Zawinul in 1988. The band evolved out of Zawinul's former
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 0x130cc76fd0394aa3fdbec8bb86849c8f71071b9fd42b2299d38089f138f0ba90. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5a6ac30-b26d-4967-81c0-875cd487059a.json and https://artists.proofprofile.net/proofs/artist/d5a6ac30-b26d-4967-81c0-875cd487059a.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 0x3d99b50ee86a34785d34607d116d044b5423d921ab2b47bb031a669064314622. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USSM10803650.
Live - Hollywood Bowl. June 13Th 1993 (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba2fb1ca9721a267ac5d5ffd4270a65fd5b0fbf7f377f3b5fd2572795878faf. 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/USBT21627390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ec029e05d722c992f700c8b791cd10ff3241e262c75fa01d660504e1a2a0eb. 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/USBT21627391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb435c18f87ff06beda09936126a15871635a79033b052b17149c499f11f784c2. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USBT21627392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449782a32703e223a1a66209ac12a298df91f160f617383745a09745b7b85d34. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USBT21627393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67855d730095c1d08655e4b48935d9c87d4e3e138c36f792af438754752fb5a8. 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/USBT21627394.
Badhia Boogie Woogie Waltz - Live (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3e00da8c18373fffc91617324cf21ef290e7b29afc6ee46bac4f90d896218a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USBT21627395.
Corner Pocket, Sex Machine, Corner Pocket - Live (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351f11cd52509c4e8c8a21d2127f9d4171d12fc56c11b5c4dc17cb5a969893e2. 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/USBT21627396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2278a195c38bf919eca29d61eea51aebc28c2f87e9d726fc800de875a7b15bec. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEA310500188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf767619b39cbf06309f2e7feb6ac6f30c31366623413863caa1c67c587458ffc. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DEA310500189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4691ff088fdd6b97d11ded4744297bab2ec6233f8c5cd6cf0e84cd703cafbb6e. 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/DEA310500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0facd734b188c295ed78a6f2db667398b73615a912fcf729e452df5ffa95ce02. 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/DEA310500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1840584c10db36fc0d8a43e92f1f52956d2f5d071996156217a42d11fc7b5ec2. 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/DEA310500192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc89fff29d9186a99fac0dd949d0181fea73aaba23cb71c6d0dab78aeaa8c4d. 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/DEA310500193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4073656223d59979da886a4ba54104fe68962fcff586eef9a6c5fd838587fd3e. 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/DEA310500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1ce36f27892f1acef58841e5ae613de27c6d86c3e034a095142f1119c4555a. 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/DEA310500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce9f0649a5d34b083ca76ca8c91a31a1c907ae8a9f100b42ebcc628ac343def. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEA310500196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8522140a36e27fc4a3a3490e43f467565217e710ca650e7d8bbdc778c0633d62. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEA310500197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b6102cef7a39ac21bf2d41ac328be8c66b80f07fc930feede1651ed3acfc8a. 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/DEA310500198.