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 0x709872417e62fa70b5353ba4e304c75e166b1ff1c4fd6c514a4fddf57379c09f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ce7b47e-8394-43a4-8146-3660f33e3b4d.json and https://artists.proofprofile.net/proofs/artist/1ce7b47e-8394-43a4-8146-3660f33e3b4d.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 0x284e49e947a7b2f755e4ca9635d5d73f74aba0b44fca4b036d3f7ccd56299e58. 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/BRMKP1200278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60614d29b995503ce022682001e21e0b7c587a151e28d9b52a0a8e970225c611. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRMKP1200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd480732de33b88c85a1a1177f67dee24ebb324de6fd7b71a5ab0557108e5aa89. 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/BRMKP1200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd017c86a010038789140985df4fb0ccdcf52cdb025f2ae0f49be710ab33b903e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRMKP1300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a00918a394414d9613f5b331003b4026b6639289710711ecc35ae1baefc672. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BRMKP1300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a147e9301bac9f1842aed57ad9866d663d2d5f1a7964ea540b1aa6cd6cac240. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/BRMKP1300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89464d30e276cb920d385f596e9adc0e5c2d8e2a06ff8765a6516cfdfb11f9b6. 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/BRMKP1300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ece53eee77fc286a87f7c948461754305ef17c8e6ac5f7a1c9402e1e9c3d239. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/BRMKP1300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563169d89dd10d3bca9be7638e3ef43022cb2d53e24e7c8811e41c66ca1f94fb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRMKP1300709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2acaa3b741faa3fca8b8dbf239b9dd1b81a6a82395424431df18e3f8da0dd9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:48:58Z), 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/BRMKP1500311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8672f7d7ac6bb1a92b002c0dc71699a9509aba4e58ee898fbf1dd9fcd729390f. 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/BRMKP1500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84806926655f904dcfa0079082299971e2460d74c7335a38ebf8186b47446e70. 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/BRMKP1500314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733a053fc025bcab471733ee2ee1cd42c7bb72f0c2b8436c58146dd0d0f6afea. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRMKP1500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c3aa2a6dc88dafd34ba2b8bf45533075a5fc636cd995826f8825b624eb9216. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BRMKP1500316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2d2b81e04dbea6194581e7f7150fd729cd5b534ff0744e2b11e960ecf6a76d. 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/BRMKP1500317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8250ac1752c1f7dc966b903ae197dd889f13e872d8042e71a0dcd853d4e427e. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/BRMKP1500318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc04bdc0e800c11f924cdb3c650a83f9d4f7a9baaed12df301c0e6ab46f6d41. 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/BRMKP1500319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6af7a4c194510ecb42b1c6bc23830682aafa8cf4155b9f57f4ac3fea1a6bade. 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/BRMKP2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab81db94af24bc07fba2846c98aac6cb4a7ba12adf77e005775e72cb8659b0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:38:50Z), 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/BRMKP2100618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540357477ab51d429a1e0f224db2ffca7e0bd29fa57e58e21852468a4f84abb6. 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/BRMKP2100638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce74dee104943acf7f905702254bf999870166eb776d1b1a1239da1eea40ac32. 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/BRMKP2200584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56ac903683c43df98f3cbd3490a72f72e398ecada4ba019d9231700574fa5d8. 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/BRMKP2200707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e713ace98ba4034c270b8850e37f643589d3ab95930599780d4474f54f18d1d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:15Z), 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/BRMKP2200385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ca5d9677efe19e2f0d5e85d80f20230b1c1f4e6690215da116b51d1bd6880a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:31:45Z), 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/BRMKP2200387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fcc3fa1796f8f742a237071fb296c638453c2b93f3eafd001643bebc22dcd8. 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/BRMKP2300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2edbdb5c20b7f0f63b2725a83344dbf02de36c680e43a8187baf302ef7329ee. 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/BRMKP2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370f3b064e8efb5f26169e66516e39ccee190f06b32b7cb90d23346796358529. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRMKP1700545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90e09b98a9d690a7e112adab2b9ec465a1fa83523dfdd2b470a171d16050021. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRMKP1400116.
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 0x37db1e441269fa90a6d756841a1d64e1be08f0df00bf77db565549c0d0b9526a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRMKP1600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46168ef10b372bf35c05e1492e2ab65eca5ef408b0c27732522b9436fe05877f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BRMKP1700436.