Otis Spann (March 21, 1924, or 1930April 24, 1970) was an American blues musician many consider the leading postwar Chicago blues pianist. Early life Sources differ over Spann's early years. Some sta
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 0x9594ad892f576a54f0aaf4a464f6b8410e4febe0da3233c77073df869e215c4f. 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/f60538e4-db08-49ca-bc73-8246b9140031.json and https://artists.proofprofile.net/proofs/artist/f60538e4-db08-49ca-bc73-8246b9140031.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 0xeb60b89ee13838ddc2ea597e6f59872d4e75d61a538ef3339441c550d2be0c27. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZR8K2127000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133524961bc0fc4522814f8d78cbb5e1cf7113eaec4ca1b09f13941746b09211. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:03:08Z), 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/QZR8K2127004.
I Got Rambling On My Mind #2 - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a2b1d096e79aa2d867a9a1f9705d78f6ba2c27e87a0448bde3cfe49ba40c2a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZR8K2127008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4509f158c320251cb257d92608447f5a1de106f3ed544a6e9c3f0add6dc71a. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZR8K2127009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb585e1c7c02fb6af654109d2be8a1fd57f5107e0e2823ed5eaa8ea3ef92dd4fb. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QMBZ91933576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b6a8183e838812de5e99d1b776510601f8d4d37af58faefedbfbe5cc12949d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBBBN6900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23cd3f7ac0dd94c28776acd6b9bef20ed094534ada8a50924deef3463705ed8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:08:03Z), 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/GBBBN6902068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e08e2492d6c2033c201b3362101356987d27767cd6ef3ea45792a8910e064. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:50Z), 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/GBBBN0102588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a9b1ca0e978595c7190a7e1fb169efc0691aa1dfd21f3490c58f8205d9deb4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:07:30Z), 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/GBBBN6900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d123f11ed9acff95dedf76ada94c1ca74d92c0ca1c2e17ff5e41a3d085d04. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBBBN6902087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b6a8183e838812de5e99d1b776510601f8d4d37af58faefedbfbe5cc12949d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBBBN6900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23cd3f7ac0dd94c28776acd6b9bef20ed094534ada8a50924deef3463705ed8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBBBN6902068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e08e2492d6c2033c201b3362101356987d27767cd6ef3ea45792a8910e064. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBBBN0102588.
It Must Have Been The Devil - 2024 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ca1020323f985fc0c74b74766fe9b05675e992f18f3cfc57e8deda3d7dfb19. 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/QZR8K2322200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b5f96847a4492ae3345207276ac198c4cf42f16388bbd5ebc77b8902b551d9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZR8K2322201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1d530e3896525db7e80ebe66f44f0186e1218a1462b4a8a43ab74b370f9601. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:22Z), 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/QZR8K2322205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86347590281fcb8db474039dd898d214a7f9870b812f0ced94178c22089b3c78. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USFI86500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b46316048fcea3901b77076c3771e5c72818811892dd15086a70de8081fd55a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:55:04Z), 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/USFI86500063.
Last Call (Live at the Boston Teaparty 1970)
Otis Spann - From The Archives (Digitally Remastered)
The Other Otis - [The Dave Cash Collection]
Over the Top Blues Masterpieces (Remastered)
The New York Studio Masters August 1960 (vol.2)
The New York Studio Masters August 1960 (vol.1)
Essential Classics, Vol. 453: Otis Spann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db343bbc7f52ceabc5e9e6fc097618d47a424295f24d631a26ee3ef61a58d1. 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/GB03A1400123.
The Devil's Jukebox Vol. 1 (36 Black and Evil Blues Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7420221e15c6d672764927991a353a0ca0963ca8d65d747dd85084cddcafc584. 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/DEXN92346618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9f4b70c791b8f1c241eb2cc6e85ebf72f90a1166693705b57554451e1c0bc1. 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/DEXN92346631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb840928861a3f3bc58ba069dba3d62d00a3aa3307fefacf96f367ca1d8b4514e. 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/CAJ221800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf465ca0e107e1d5fa625a3fd67042fe81a660c1752e9d2280cc0ee386d30c78. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-21T16:15:51Z), 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/CAJ221800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7cfd3999955c1ff95966e3e673018a66f8d58c7deb81ef53b9a54391891265. 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/CAJ221800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa945b284d1843d3ff59180c214a8af5c5d0e9ab70b2e25e433bd9ae2cedaa61d. 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/CAJ221800047.
The Blue Horizon Story 1965 - 1970 Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85d82e818a330de835cbdb92b81a88ec0b4c3d225c2d3c856e29104ab912f40. 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/GBBBN9702075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b09ab289a7187161dae04ec6d6770833beeabd5565d67610c3278930faac6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CAJ221800044.
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
Laverne (Why Do You Treat Me So Mean?) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f5e2da2838d04a004a7e5bd78bf5ad2a086641be21ee86d413abbb63f1730a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CAJ221800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d83c03c43b83c2366dc7722f340fc749c63e582ebe37373bc148f847e81496. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CAJ221800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d608cea50a466b3879c218a9f0e5a9a63bd12f12cb5dee4cab66eeacc31a96. 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/CAJ221800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c8c0a64ad40a58a7d8002b3a9977e77ca1264087aecf831141b5f9c4fab21a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CAJ221800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b94fa9b6280104c61526bd04f7497c0c71be7f4440b3f8fd3194afc0810a7a. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/CAJ221800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4941218da97331700a1f1b44e8fdc6dd29e38df0f561b7c0d1e94a28748a9061. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBBBN6902104.