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 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 0xf1425a53f1edce2c90ea6ed2e87ad4c695950e3ada64ead5c78e2f7621295b8e. 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/b3e92a67-c7dd-44be-8a4d-cfd176babcae.json and https://artists.proofprofile.net/proofs/artist/b3e92a67-c7dd-44be-8a4d-cfd176babcae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Come Behind Me, So Good! (Alva Noto Remix)
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 0x20897fb8b64fbb33b7cb038035ffdd169f05419ccbe7b7a2296e1b0a56432121. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ITC491900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1e635b3b3e6d301add90da80a2c35da899482bc91d21d47f980a64fc5b759f. 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/ITC491900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65641d021b03243cbf1d16f39ce840a20510f1099e2306ab6d1b75c6791083e. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ITC491800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4123949bd7f89d21604bc565ab89a9bd17f406c50df6f6fb180dadfce3e1af. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/ITC491800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3f16201851d4b2dfc39fd55cbfb3db67a249f6599c7ca045a2f81764ccac75. 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/ITC491800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a48a05d0aa0622520632643b5db17eb8afa43fd09552d8466adca56df36ab9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ITC491800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75955ad4af45e551394d4c8667dd3612005500da09d63f13d25060a5ae3881e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ITC491800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd5e417f8a90359eb8584b98aa08c15a2b3b2f6e81aebdcd5f48c560a5e5b36. 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/ITC492000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872af9021862dc1fa2507da88fad43eb994c53d73fdd0ff6378515da7c51fe40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMMZN1300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fde6ff2fd2f7836bbf91b6fd20f4c4788fb7b996aeabfdb741cfbc9ccc76e0. 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/GBBPW1100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffe207afe4ce7f123587435b2989608c9401f4817ed1fbed72e7d11ede4de9b. 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/GB5P52200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffe207afe4ce7f123587435b2989608c9401f4817ed1fbed72e7d11ede4de9b. 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/GB5P52200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d99e9b6b311c51d471c98e487fd1b1acedd043883d5b2ba86f9751b6bf9ad7f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEL021470124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafac9d46aab7002e704ca19c0ac56b0fe3f47a2f29307dfb7d0b3ef762b7a637. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEL021470125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9fefdf55fb41bede2d1e2738647d79712838268e64644f41839e63ae910529. 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/DEL021470129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fde6ff2fd2f7836bbf91b6fd20f4c4788fb7b996aeabfdb741cfbc9ccc76e0. 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/GBBPW1100052.