KAZU (90.3 MHz) is a non-commercial FM radio station licensed to Pacific Grove, California, and serving the Monterey Bay area of the California Coast. It is a listener-supported public radio station
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 0x90f93e0dc31f2de48a4f42724ce16c33b36531d40a1bd67368b3b8f625bcab03. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d280202-6e5d-4438-bcf6-c2b67e347ebc.json and https://artists.proofprofile.net/proofs/artist/2d280202-6e5d-4438-bcf6-c2b67e347ebc.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 0xf7b9520afe6e1139713ac4fa00800ff3ea744f66d751135763d6079113a326b7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2369857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa251cd9342cec38cfcf94e8995e9fa8df18db4d6a810512d1a9971ee408157da. 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/CA5KR2465648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0a7f57fd8dde2d49025c49340700a4573e63d59ecfa11072491d1062d2d42a. 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/GB8KE2214228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9410caa8f39322891c4672ea5c0e5b0b161534fcc06fbd27c1ca3ff56f97286. 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/GB8KE2202070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5268db8d268e7b7c6cf9dd73205202f3547178724da4813b56ca106466d4207. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USLZJ2385300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccc161c82fd07f778877ad3629913205fb28c7a425b6162c1d2acf0cd3f3a55. 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/GX8LD2351008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9711cd84c253275213280c9e629937a8970d7463b5d1e4b4769d99a606528e89. 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/QZS642396348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd20e59be26c0dcb50739fc48fed669fddb9d0fbb70e4a553ab7d30d42b48b9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS632327849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75c4a8783e24165033ef708d52f3ad91a3f841961dc3920b8aba377c53a2a51. 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/QZS632270739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106542646bb1e0b549c66da7020a007b984f190e1b6158db50669bcb55189776. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS672216554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922a9b11e8ca32a291da16c2c7e37ddd6ec9cb876f079772e14cc4cb5182ca28. 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/QZHN62238423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600cbc1fc1d38696c40b629add49c100b271ae1ede3b77b608c40d976c3a7fd0. 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/TCAGA2226439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26ae65614773e37fdb604a686024e8a64fa588dd83a89973687c850720d7ca4. 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/QM42K2241694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c66ea2f07b753019e4e3e535ae97f9d5290fd464c3dd8f131628ac2ed5ff46. 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/TCAGA2230833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa580866eac61c65fed3b178ddb125c5e537f5426cb952e42e365d85315153af4. 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/QZ5FN2256831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c0d36cc6a5d5178c83b0912496ed8afad06489653641c92ffb419ebd13fa44. 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/RUA1D2150449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c4a1aac0bf95596a39d402a8c64041ef4cbe973a8a5c2a5180005bae343ef. 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/RUA1D2150451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694d020d5e5cc6f5241919272b5436671f62e2791dd126d0058413e1a170026b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/RUA1D2150445.
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 0xc604201a70f2140b01c913a5a66bc08a61d5bc7a90ffe4430345e0608a3c1eb4. 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/RUA1D2150447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db8537dbcce4f687bff4f26c6bb86528a23699ae3a41c62e324b2ba6a41fb48. 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/GB8KE2162571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45c21e1669e2232d4825dc738500c4ff09b712a53f0c582bb46959a12ad6258. 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/GB8KE2162572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2abcd528a0d2504651907e68dea5cf8c5cd8356c1dcea913bf2121b098cba1d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GB8KE2162570.