Bryan Tucker Zimmerman (February 14, 1941 – January 17, 2026) was an American singer-songwriter. Early life and education Zimmerman was born on February 14, 1941, in San Francisco, California. At a
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 0x063c29ec336b8a0c69c3d1ac53380c575e636d723d201678ef42001e9e1c381e. 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/d44b2c7d-244d-4b78-acc3-693410b15a43.json and https://artists.proofprofile.net/proofs/artist/d44b2c7d-244d-4b78-acc3-693410b15a43.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 0x0b9e85284ac32c588090c98a29a1b300cdafb05040ebdd86d7bdec2a89aa8363. 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/GBBWX1400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158212e862e520c8de069984be443a593971c99bff93896ffdd3b95c64c3fef5. 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/GBBWX1400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc69cd441bb6c87d677a9f4f3d2b1743d417a157c051970eda5a80aa1741a62. 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/BEX057725604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05451afaf47f03f19864b366582d4969f58093ed3b8f2d5e83f17162de466bae. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BEX057725605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dff6d03fbfa8374d7ffaae60ab6f0dde976cca0af1f88f2d03ec4b93e65813. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BEX057725607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576d58fb43420c7d8fca1331ab0132b736a443e79fbef970d2216db31edfc3f0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BEX057725608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e53adfefa25b0909ef269f27694d96814a8d558636bd5da9fd73aa27e89d67. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/BEX057725609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf9881b03d55386f679c4113dc01d4910c19ad5820dbe21af1fc17f0b24f678. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/BEX057725610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f08aa7d476b374cb7687cfd21343a969bd9033d7d7e1a23113a92e06f5e4ab5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BEX058025703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20902a0045bba14be8bafca1defc842e99ffc9941ac90c84f065fb9fe9cd1d2d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BEX058025704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977b160345a16ae548404e49a2c94800601001ed5f75ea8e4082036d632640cd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BEX058025706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ca92a17c13af18471def7efc186c2c54e5431d74df78c2a547d7b55eada168. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BEX058025707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24fcab33c17f4e014617fd1d0e095e21eee0beaccd6cba33689f725796c3cfa. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEBF80617702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29dcac5471c5090729aae9d7ea22c1a9ac17d9ccc4d3cc92225be092fe8a11a. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DEBF80617703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ec1890233d575ab7d595c61f9667c3f74cc52bb7e2bf6b4d2aec1add01f1e4. 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/DEBF80617704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3538a74f69926a008ae3ee015b055c7ef9ebb4ff88b4ca71fcdde7463560f7f. 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/DEBF80617707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09ace026d53ed6979c3f2155ea0b9b8f7df243e008213a1e89ed43f3d9a6b49. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEBF80617709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bae2df2f109851a498f75a614bfda95ce1e149bd7abe9781a4dddd242aa7f5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BEX052131406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd027e78173bc3c89240d549e991adb56e8449f8a12145ad738dddd2f6ea3a63. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBRSX2400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f79913f651a5a06337c083bcc82796667262cd9241b4f17da46bf3966c871f0. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GBRSX2500256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b980f93a5b35ffbaa59652b6b084cbe003ab0a23c05765c307296734f9cc5f5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBRSX2500257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4706e0b3bf3d9e2e6a12d0cdf3a4983594e14c0a7401218bd3bee28ac6a2ade. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBRSX2500258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d4c2b48ecc7b17636d6fbaecb4feb7fdc16663800f46c684d9c91fd2cfcad6. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/GBRSX2500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7759628f727c6b4c821ce38ca811daf54736f4bc5b22223be4078f35db4dd790. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/GBRSX2500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67976a599c82208f6f8472db753fe70f93a9f56bbd0ac15e6026abdb49b20ad1. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBRSX2500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6583c8db79d5904ca89fb84969e180dcd4082dbbb171876d1f1d6ef9c33dcf8e. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GBRSX2500262.