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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 0x92d0d82e73615c5c4b54728b94785a8fffe15b5004449c2532338059d993f515. 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/f88b2435-0d5e-4d41-a1c8-fc6fdd229aea.json and https://artists.proofprofile.net/proofs/artist/f88b2435-0d5e-4d41-a1c8-fc6fdd229aea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x7d094ec4982114b92da3361bf91194567ac395872b2d854dc4cc854cb80fff0e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USCGH1919148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc245f5686ec50c7b0607853f2ee4fe5e403985f7abf6d80a90861e47bc9bdbe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGH1919150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdd9f6febf11488c64b08782e66d6cc95cb6abfe09a08ebf5f4fe5b01b6d8ac. 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/USCGH1919151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1398e420a044165c2f04551bf327333086b470e98edb090bc183936749902ca. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USCGH1919131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb411b436e6063a15225cf3f517b65f9c8f33568403dc248e5fa87f6c9fd3eb1f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USCGH1919152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c15c2e4524d928f7cb3690648ec967ced11daa62baf3d7bae2543fa2fa4cde. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USCGH1919153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5ab86d8b40b7240cb71d256692e94392258c5a0d6dd7f87677e9285acd239c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGH1919132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac2451e59a82222bed2c931b058fea547921fbbaabca34446e9acaf04e204da. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH1919154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3ec51d1f054d3da3deb22e18bcd15f7599938baecf105041c347d508490edd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USCGH1919133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72df414d7cf456703773b25c0f7bf0ced79ae624b7bc6481168e6af42064017a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USCGH1919134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dcf9aa6d0583461b4f9dc72db46a097c0ba310038f521e0858657db2bf1710. 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/USCGH1919155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6073cf408c0250f090b7ea9cf9d5293f0ba7efd77d4a52a3d6bd381667e260. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USCGH1919135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb2b7983f213caa6c4ed414a781ef448dd064aec5aaafaf8c1997a6c8e9ca3. 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/USCGH1919157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc474223d159fef086f1d37b67d1d4da6513d36121efcfad4ac26d391c127d527. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USCGH1919137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eb93216113bfbfb02f45ebaebace57423944fc02a5b4db234298b35bedcfcd. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/USCGH1919138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba12612cd58e7e7b6b502cd04ba171de4a7eb7fbe7b3be94642b3cb0f85efad4. 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/USCGH1919139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38233f89f9859115712c2c378e4bbff4086099a51d4d8e9fed9c3db181905b87. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USCGH1919160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3a5814c4c065fb5541c5831fb5979925005504908195f3bf27f317086a648d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USCGH1919141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3ece023e70a1f45b8d6381adee3f52a99ba488753761bf2fa3bddc16b5fc9b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGH1919142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3951fa6062f264b0e28dc44599364969897c8b18b0272da4192097661c9c044c. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USCGH1919164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e3c9ecbcd839e2b0a0277a08458720d400c374a82397d052a0b17880326e45. 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/USCGH1919144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7715d73c6744b4216061bd76b1376eced109522b9dd7ae3125a8b320f507689. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USCGH1919166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303ee86a1e9286272f140220b5f133a339dd2d039616aa4081dbea0ceb7f08fb. 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/USCGH1919145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d07ddc0b09623787fb09218c745b805296b47182bfa454542dc561f6829533. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USCGH1919146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf737651ca7b05bcbfbd66f83afe77086279506778a6a4fc62ccae6cb2da9b005. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USCGH1919169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e63df6b62b10f9695e2305a81c8c8a40fa1e40d72c068a5b619ca2fb7dc13ba. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGH1919170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403d3aee41532ffd61292103310603b7432e3630da0e36e680763ca92b90def4. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USCGH1919175.