Information at National Public Radio is a Japanese jazz trumpeter and arranger. Kuroda came to music by joining his school's big band. Later he frequently visited jam sessions in Kobe. In 2003 he mo
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 0x0934078e511516f57e527bd18e2759dee0ab4b832ddf597a0c9fdace79c67c7d. 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/0e2c4ab9-1339-4a1f-a9a6-c6804c37f502.json and https://artists.proofprofile.net/proofs/artist/0e2c4ab9-1339-4a1f-a9a6-c6804c37f502.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 0x2b673a66d950622fe493823de68d3ce0a70e60d4937e3cf55a943febef8f7d2d. 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/USUM71317805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9897e341ea412c6ffdef8f75cc94eb18f2d29c1c585a07ee42fc769935282f4c. 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/HUBN62100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb360b3ac3249b203c4a64ddbb6b74f6b0449b6b919ae0051a13595a7e464fe71. 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/TWFF32300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b673a66d950622fe493823de68d3ce0a70e60d4937e3cf55a943febef8f7d2d. 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/USUM71317805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a40b73a317ceb8b020cc7774f1b41b2e94e9f06138f80545af3d4855767656d. 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/USC4R1605254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe534bd49a188ebfa20f3d6cff9d2c8cc9730b38236187ace2f06ec1d994027e2. 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/USC4R1605255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f194541d1637925327c72fe238e06b3ea6aa5f678a402058df594cbaa25c9d. 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/USC4R1605256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e209138e50d2943ac6e8c29557de2042e446e7900d41b3d65c97c776d848aca. 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/USC4R1605257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4806f2ecc7e4419a5f99c9de7d5989d9abf7110d4f78b411f111e3fa9219f7d9. 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/USC4R1605258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a520846a4d5fbf24ed56cb8c55cb10eff4e48e8294251c64f043c70f95d0a7c. 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/USC4R1605259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1490a169066b7e91ab47a8c01909c4f02abd18da2c734435f8013d47d83cbd75. 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/USC4R1605260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163a5e7e559fbbac21936e9c7ae1e95d80d0228dbdfc1eb8277bf3133ce14151. 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/USC4R1605262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf463609764e2c481da14215fa074a2e02f5e35f40f64d9f6aa312e0faf968e5c. 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/USC4R1605263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b673a66d950622fe493823de68d3ce0a70e60d4937e3cf55a943febef8f7d2d. 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/USUM71317805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ae8cf233a2821f85c2ba2dad1e6ae17010845ae68f620a0c6d81b41d570b40. 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/JPPO01903565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe118303dabdf42177938bade9529095d2ae1194ca780cb0cd07909a3327094c5. 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/USC4R1605261.
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