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 0xccb1d8d92a6f328125aba5c0683eff2aa8a1dc186ccec1c046da90e2ccbc85ab. 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/3efe08e2-9a3a-4252-8cfc-1f33770fafcc.json and https://artists.proofprofile.net/proofs/artist/3efe08e2-9a3a-4252-8cfc-1f33770fafcc.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 0x1e5cb3be55968bd1d1a6fd76f892797362700c56b06a5ab02deeb7c8f9859d39. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/FR10S1805301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf9cbd87c446bd0b1e628254ea371b0394e29ed54ac37fc1d56c17ea8755538. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:25Z), 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/FR10S1805945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f281fc1bc902426674944b3b1a5e7c08c4e1bbc978aa27b6a5c89c708801abb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:46:22Z), 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/QM42K1886722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07dea9ca59e3f3df94b093ef3902d367c875e88a57cbe2302d67b21aaa7a628. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFZ41919271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867911b7fec316d8995d244a6a47f002e362d1356b75b18c5780f13042e43418. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:22Z), 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/US3DF2008084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69815afbaa8550a795170b5bb88567582310e03153266b7d5b42b68b42271206. 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/QZMHP2022522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5c7a0b01dbee3085a697f2e0f107e560f2005b3f73f71017af647b240bd896. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZMHM2091591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c95a1cdd9697077101e0a94db87aea8832c6690881a8387891b205b4e5beed3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZS632108769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148c1b78e1c45f1edcdd37236b4519792e87a45a67257074a709c246b357072e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZS672144514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d3a297eef89c57022f1f51ad574506c2b7d4d25a10dfed26b808b72b6b4022. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZS652144897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358a6ed4ab1581ab34fa2839d55c1c017104e6db5d48ac8acceb22a8e9224213. 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/QZS662117951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f131c02aee2e3e10c2aa19a008ba9364df71148eb723e6f4a948c3668a74e73. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZS632274072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d49eba549ec8fc8902118e4f21b43d24815036788b992f2a8bca13483cfeba2. 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/QZMHK2238933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0bff71e12aa177f296d8e2fb321cc773f4fb436270acf72abe4f47d5f3599e. 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/QZS632356139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9690ef87ec640a7c1ee311b6725c6a2173014f77b9e4d31414660ebe0dd717e2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZS642592458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac3270651273841d1bb01e5c572b04e275bf18752820d9ccba6498366373dbe. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMHP2518100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44920607584e996c7b562f0f844fcd169ad967339ce962965940315dd741c3f6. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:03:14Z), 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/QZS632581468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503601b26c749bd8e30bd76bb698e4e354878266c1c0402194e5b5c88a4682f1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMHK2514523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa993ad165af2f49c96c488a8a33a66ee65b86c405ee771da7b3f5effb6fb94ef. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:06:37Z), 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/QZMHL2567859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c8db6d080768b6265f14dc44d5ea4b793da2457ae5489a8d2834d4ca37b039. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZS642592509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bfde47f0f4aa41a8ede765d9d2e9b1f5646ab3136963aae95ee186bf1d98b2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZMHL2500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ada7fd5036943c5e90c9b0e8238d549e097409a6f177537908337da45e981d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZS632544279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f8d1e5cf37b33a97b521d40001d9334b90feac98864e2898a14d50881fab77. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T07:58:09Z), 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/QZS642547262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca340e04e4c16b67a2d192aba4fa066f0c9c81e32f0ab2b512c99069b94270e7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMHL2568232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09f67428e6e15e63f2908aace69dfce64f6f7cb1a1656909836461bf7fc5019. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM42K2591296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b48620a5d3eb807848ab4b4c54007fedf3ab8dcc41f0439ef78f777c1233553. 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/QM42K2062189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fe81502e7a07763cc00cc76a5a39a5d605c7c586860b5d75698b68323bee71. 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/TCADS1859442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508255bb682efddaecfd99f6b06955da0be1003c2ebd0f57c4bfbe494712f958. 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/QZMHP2402102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d0cba1abac1d6067bafe75018ea04d0d28f1ce09f848343896c86884840093. 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/CA5KR2249054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d0cba1abac1d6067bafe75018ea04d0d28f1ce09f848343896c86884840093. 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/CA5KR2249054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010257f1cee23f2e4f1048eabe6027f80ebec00a57d5b19d56a06c99bbc9cf52. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB32233125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13175b7ab9d3dbca8d1df51bb117d8029f6fe9f29bfac0192b30cd40e30a8c1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMEZE1906479.
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