thumb|391x391px|Maupin at 30th Detroit International Jazz Festival Bennie Maupin (born August 29, 1940) is an American jazz multi-instrumentalist who performs on various saxophones, flute, and bass cl
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 0x969e56361368a1b7e00a2c504e58e1bb2b29de651deaac610290fb80ab74c5dd. 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/ffaea14f-85cf-47d0-94f2-bbfefef4635a.json and https://artists.proofprofile.net/proofs/artist/ffaea14f-85cf-47d0-94f2-bbfefef4635a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe227344860869f221fb69244e77fa563f50f126a3a67ba80878d6ded445779eb. 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/DEB337404302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed665927cc9895aa634e73702e0ac9b4562a7c5ecec3563669c563314e731b0a. 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/DEB337404303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38495a5dce645c8876fbb9e8d26f24774f8d95624840c52304899660c49e1c6c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:40:59Z), 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/DEB337404305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4951fe156fc3c6c4a13cacaf15aef29ed2c23fa505959ac1f9bab7b8cdda6179. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEB337404306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf365e8d9d13c8458c3511f1f8e5592d64f7bf5e81a1255f4902bcd183bbc90. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEB337404307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf655d07faadd51cd26c3974c3bb23c34598024c036333b043a588eb40bf52f9b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEB337404308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92df0e0375827e7a6a3623bba114f1b1a5d62f8ec4f903af0a1c169e6a11679. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USUM71318338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ed83655eaf6791c6e6459e6838c04e2881cf0560468525135eb0b1b35e0082. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:33:17Z), 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/USUM71318339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de3f6aabdb93ec870e2a1ae50be949850e4158a4cf84d8670d3bb9629fa4d94. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUM71318340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cca689a6536e186c7c73e3a44f292bf6112c3084cf209ec805a17e03500eba. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUM71318342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1769916c397b70920e44c27fd3aca48f1bc9d90f1d0242e44d9a4d9d0be8ed48. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USUM71318328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb5391c094c5327154e91d2811fd7e025eea9b8fd1d95d62ecd1820444c326d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEG932102595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e524767d3ab9eb4f674dac295556510b5a46184d3293aba7af5c69969c36834. 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/DEG932102596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f17093e8986290998a3735098d8f608e42d5b8e5a8a115c6c434577be2290a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEG932102597.
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
John McLaughlin (feat. Wayne Shorter, Bennie Maupin, John McLaughlin, Chick Corea, Joe Zawinul, Dave Holland & Harvey Brooks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b951a356df139dc2a8497a98673a9cfa35930f3f4c16d88be462a4507322c3a. 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/USSM16900317.
Bitches Brew (feat. Wayne Shorter, Bennie Maupin, John McLaughlin, Chick Corea, Joe Zawinul, Dave Holland & Harvey Brooks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463462d82e68cc46dfe9e8a5ce00df90c94507f86fbb968d561eea2de4b11fd2. 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/USSM16900316.
Spanish Key (feat. Wayne Shorter, Bennie Maupin, John McLaughlin, Chick Corea, Joe Zawinul, Dave Holland & Harvey Brooks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ad0221dcaf8128de90592b5c2ded21d2b8be9a063bf1e1dd288743cb2a7240. 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/USSM16900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b951a356df139dc2a8497a98673a9cfa35930f3f4c16d88be462a4507322c3a. 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/USSM16900317.
Miles Runs the Voodoo Down (feat. Wayne Shorter, Bennie Maupin, John McLaughlin, Chick Corea, Joe Zawinul, Dave Holland & Harvey Brooks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e924f37828ee3adef3a6ada16e0fb1a4fbbf9a952938602c236fbc6d745844c. 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/USSM16900319.
Sanctuary (feat. Wayne Shorter, Bennie Maupin, John McLaughlin, Chick Corea, Joe Zawinul, Dave Holland & Harvey Brooks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabde780691b1a8716048424a08244fc3d432fabb803f8746fb40dbb950cad851. 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/USSM16900318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463462d82e68cc46dfe9e8a5ce00df90c94507f86fbb968d561eea2de4b11fd2. 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/USSM16900316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ad0221dcaf8128de90592b5c2ded21d2b8be9a063bf1e1dd288743cb2a7240. 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/USSM16900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b951a356df139dc2a8497a98673a9cfa35930f3f4c16d88be462a4507322c3a. 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/USSM16900317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabde780691b1a8716048424a08244fc3d432fabb803f8746fb40dbb950cad851. 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/USSM16900318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463462d82e68cc46dfe9e8a5ce00df90c94507f86fbb968d561eea2de4b11fd2. 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/USSM16900316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ad0221dcaf8128de90592b5c2ded21d2b8be9a063bf1e1dd288743cb2a7240. 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/USSM16900320.
Jazz Lounge : pour travailler à la maison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c971648169f788b97e8a99102867ad9df525c08ece4256c5fcf0bf1993ea5fd. 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/USSM17400303.