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 0xecd47f8ca9495e6adb77492d94f51379bfd616eda4dd9703d35319eede770075. 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/03d8d4c4-e92c-4e7e-9448-ef50e4926bb4.json and https://artists.proofprofile.net/proofs/artist/03d8d4c4-e92c-4e7e-9448-ef50e4926bb4.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 0xd7653d69fb618e3690f51c5407aab24eb2d174a018417f04e07a737781d94e01. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:33Z), 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/SE2B81000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b032642056e8ad350399b45487dfd3a7afa7a940ce4be6e21c638d9ee01e1b. 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/SE2B81000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8d35d867fe18615f32a35f8f13f2be7c12d66d2acfe54213bf966b46078511. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SE2B81300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6af8fd015569d4cd5d2d8b3cadb339b5cb718accd321391a469f779c0df505. 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/SE2B89700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142c11b7475b4cbf7ad38f5be04ab53786990529e4be4820a99ad0616d183851. 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/SE2B89700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff03eeaa1c7cf25799c9fd647dd2927741eab140986e3ff9cbcab3267a75946. 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/SE2B80000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b872833ecdc85346a4105a8333f09de450f8d8cbcdfcc206f89428a6c015e52. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:48:02Z), 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/SE2B80000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41cd545d8c58ab42ec25764588b0bca95fc60874dd7bcaae9af89d7fbfd4b38. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SE2B80000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41304f6079e8942e9b589d8a19d4fef9e7a62aaef024efe3b27db87720005480. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE2B80700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b1993d58628f67bcd73541dd0b985baef85ae95d5c0260860da80f4e8f707d. 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/SE2B80700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc59affa2959e1868edc63f5895cabbf789a4c57b51a8fbf90a1762cf051910. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE2B89700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0202b35073942c8e27717d6f21c9562aa3348881d0006b0e10f0ca96fb245b54. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:27Z), 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/SE2B80000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f520c8082476a6b3f8adae61d2f22b94b50fa8098a026e757e259c4b8dded0. 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/SE2B82300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716009fffdf29052eed588a0fd5ebfd060b67bbdea691467c4d811c431452563. 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/SE2B82400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45670af8d9c7f527792dff68672015ec0dffea3fe0b72b22ab31b9ac9182b64. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE2B82400301.