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 0xe7059f96babf24bcab9b67332898b78b546056260be8bbf313607a0deee29229. 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/a0232352-3223-4625-9403-5cadcef4a7d2.json and https://artists.proofprofile.net/proofs/artist/a0232352-3223-4625-9403-5cadcef4a7d2.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 0xb87534804f94a6ae53e9903db3f39e5624e6d7f33bddc66f250915f6f04c3913. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZDA62253990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f641de9e9ea7c645be13e0b7f3b9d134cff27f3cd64e2d8fd3029ab7cf18c8c. 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/QZDA52296081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae2e54ea93a7d71bf22aac2dff58f9ccbff1260c5a1c31b7152e760965ffa98. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZFYX2328996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1923cfad3ae705bd90d57d87a8bc3c3322706fc2e5003c06b25fdaf85506fa2. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZFYX2328997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30753bbcaae70750780349a1704891ed4260551bf926813f3c9929e5457ca08. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZFYX2329001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4611fa85697902e599df4921af51a686836f316d3862735be3411c1d91d02696. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZFYX2329002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97177a0423b1787c98de950b1b3edc1ddc38e5afa9bf55cf6a4426d86c271b0a. 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/QZFYX2329003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b92fb8ecd063f334a213aaec2ae368db5a08968c52cf931689b2270f025dfe. 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/QZFYX2329004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c4d4b17e9c93a616cfa5a5bc5d7f12c0326a8142553f3e81998fa11fcb376f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAT2479547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79593e61ec27874eaf6ee6c9e196a0ae4fedccb5070e3138cdd91d54ba26332. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB72482653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19427b3ef3e886525f84feecb6a54f6d254a8ccdfda9f1392ea33cb95e35d7c3. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZWFE2446926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd827cf26a37183de7a2949959db3f65cc6d211777cc44f4b36509652827bc9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ762460185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d21ad72d0aaa452c730b076c0e1b178c7c95a124043f764f23a06eaa8817a5. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QT3F42406466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81a4afe551d215cc23681ea5370085b7b07170f4503b688d02fec6017733457. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QT3F42406467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e1c7735777631c1c7617500e0a3094ae4e66fa94848850ec6fa65c89d8e5e9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3F42406468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ded68e94b04de03a8ee2c5e143420839a112d5d673bcab90b217ba1bd7a405. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QT3F42406469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6567faac802148418ef9d891527f54a919ad95a5935372df69e81e81f92468. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZK6Q2518543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67bc8603d1ca068f69914d899756378e176546292051a8e9df12a5731135209. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFP2364468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42e881aeccbc29691bb3df297d8340dd09596ffffe97b3093a5a02302aed95e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFP2364467.
Super Kevin Kart: The Chiptune Experience