Pearl Django is a jazz group established in 1994 in Tacoma, Washington by guitarists Neil Andersson and Dudley HillSeattle Times: Dudley Hill, who started popular band Pearl Django, dies at 56 01/20/2
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 0x96297ac6372955364cfe1ba56a4cec088424d55b348afa9e1c6d3ae7787c137c. 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/1d51dd83-8a04-4ac9-b8a3-6d298866ee13.json and https://artists.proofprofile.net/proofs/artist/1d51dd83-8a04-4ac9-b8a3-6d298866ee13.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 0x7de978733b804ae09a350f562182893ce5a00ba75f51200a11e77c704ab7fad0. 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/US3K52000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b17fdbf3f865146636fad6a2db2202fd4adab12d3070bb91e79ec5e48e7e4c. 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/US3K51700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392c7b87a71cef794958363c525caed562eb6bbf03e52701e4c78b81ac2f4a96. 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/US3K51700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf901f6f4e415537dfd4eefd864ef5ddc244a56ce55694298ad44868515513b5. 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/US3K51700253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f7436e67302764b9166016446ba325535dedc67a9732c5e4f3256449cab6df. 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/US3K51700255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff7dc7d5bc542da7a161bd444215edbf893240b6821dd7fcb408a22ebea7e30. 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/US3K51700257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e75da3a386e7b497f5d6344ece9e53e067627fabc3db08ac88bb285e806e72. 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/US3K51700258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dd9f90001ea236e7b6af9135637228d78f89f8e6e2149a99cfc8115a2bebc0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:07:17Z), 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/US3K51500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f87b0152a970905ecdc9a5b58ca97b3abec40788f8d1968a65cfb133ee0ad56. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3K51500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7e1be4dc1bebafae30b4d101f8ac303d296c91c48b527d1ed1f6907fe5d3e1. 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/US3K51200195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88edaa02d7aa85e56235f7b6a46a07326402b2fcd42bba43e6d830135ed3a546. 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/US3K51200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967f5a0d34395ad6f73ea62ef93fae76c9a2716a487149b9e88edd23948e32a7. 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/US3K51200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc158b0d5efefb2b341036015e1c1200c6e3fad0c8b2fbd06ed11c3b6f22fce5. 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/US3K51200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5f4bad6c90bc5f4be66d2e2038e8695fea50a0d92d617de9236ed8241422f9. 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/US3K51200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25847e7f848e07366b857b27d18e81160c9402967627d7419feb316d14e8221f. 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/US3K51200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab36e390488e1e1cea272e6f90eb8a127d25e8e14528dfa0b040e662735a7b0. 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/US3K51200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000bafb03c9bee25dd04e1c2bc9b5c2d0969970c96d15a898977c10ee617f6b7. 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/US3K51000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a0c9d89c653a46b7d1c943957576c328db27f81e6156675bb2fa3a6578893c. 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/US3K50400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb63c94c4ab3ee31ca3ba0b2c54b1c781b85e903d38a5b3ae01d97f877e6b04f. 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/US3K50400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa365fdda518e6f4b97c95a7db2f0d08315a8eca6f7a66ab4cd092b6998851bb. 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/US3K50400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874d078add2dbeed5dbe8877aa1e8e785f99579b9a970c24ce50b184c76e1d1c. 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/US3K50400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c871b2bc1d9e046b77e785280b17543140fb0ab1f3afec76cc779553a3c5dc. 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/US3K50400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510301ba1379fc65519eac42d95e79263c2f06eb97ac8878fcd59df36e96ea03. 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/US3K50400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d868b8d06b95617fc4dd3af32fcbfad64ef546a6f5e02df4982cce391fb87e. 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/US3K50610018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23940a1e471648ffb0459065bee40eebf84e0f12eeb1d015965fa93f2f7696f. 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/US3K50610023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2343e7b86442121678880524d976b514863b60328360cf9025e55dce738a49. 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/US3K50610025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42858f5b8244bb623a6324c01f8a1331a101f7e9af85bfc5cfd8059fc939e3c3. 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/US3K50610026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af7f16991cc1805fc5097f2c93ff8949d2d29100bb8e39fe0d2e841e09e171f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3K50610059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28db514651182088b1aea72e58a173693a5cd52b0c97592d2f9143b1cc563ab. 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/US3K50610075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0646667d09fd6e081e6c083b75c24a82047485969b7f2b852fd408be892c6731. 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/US3K50610003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b10bf502779ff629ffa92806fa50ebe86e20a13e0a3071401811cf197d05b6a. 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/US3K50610033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c210398cb415cafac9ec0f47e3e83a7f46cf68bbfbcfef4da1a27e3740cee99. 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/US3K50610044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddad23ee56aca2d72d6f6d8f44d2e5f57bf65a13e24921c428ae793c866dbf4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US3K50610045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b1000b0a3da41b104fc38b7ddbecbc501d7fcb8386845e89fe3d15a01e2e75. 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/US3K50610047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a805131e13dadf784cd94c5842c4cea93a8c9472dc0fab5d7b81146d230754. 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/US3K50610056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05785f1c1c9dc712cea9276121ac4fc143d85a9e206b95ec6f287728b0f3481. 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/US3K50610057.