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 0x6bec322bb9ba123e9c0ff05e4c1376e7ada869955955e897c194ce8f57a43c7c. 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/32766319-1526-494d-a87d-375f3c373801.json and https://artists.proofprofile.net/proofs/artist/32766319-1526-494d-a87d-375f3c373801.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 0x42d59399336330979697aba07b3422e63898d2be1b7c45f2af925bbb4cae2a58. 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/USHM22156239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6c5e6fb21f04ab93ecfc421992d0e57a99f36c930c422bfa53757e188a1e2f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USL4Q2181895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0b3469027e6f47b4485f912ee3e47cdcba4e815288b8b09b18dd7a99b9b01f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/USHM82252344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87759d293f88eb563b64eeb88ba4d57de94dd78fb7497f87ab4d53b92ec65c9. 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/QZTB52223876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ea0da3a66784e1cb7903cc80e119d70fa5d668a8a66bcef195dd263813b0c9. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTB52223878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaff24c78621b9c0c1316a514b428ed1948449b25dc89f1fdb5dadb98de9f8d1. 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/QZNWQ2385319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c58226a706d722d4efe3b3e9cdaf7f8f0fc183d4328fe2dfad8ed2118cdb4d3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWDE2485754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cddcdd263bd9c6b1718afb3b9fd87afd04c74dc496020659951ca254e6a508. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZZ8A2481558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d3dc527e3654dbd45212d700b40facde9c6d06bb1983e4ba0b50a118b18897. 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/QZZ8B2470906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680997e809ebd2e88a7247f54f247a883801011fcd028685051fd614c051d569. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZZEB2411369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415e8323e8d19119f6da242691369a2b259debe5681e16657a9deb1c7639050e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZEB2421014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d53d45776a1c1ed4ad44de63119d74c9474a42170be7af623e045e46eb0f88. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:10:34Z), 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/QZZ8A2451475.
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 0x8421eb59436d7e9e88347ec8c93c87c22ee22ea73ba7dbe050f0d3333dfa7a1c. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:37Z), 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/QZZ8A2451474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cdf787d29348b635bd782de68b632b845723f1516e1d11c2647edcb1a2490b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZZ8B2437503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5dfbba38fb57a823c459bd8013129ee02026b4b5d26c99139bc15eb255b8e0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:35Z), 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/QZZEB2411376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9068599fe09a5086e5c7a1126b757fc4544add3398c65d77c8cb071ccf0a4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZZ8A2482908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a83b0a5dfae7703c64327532b7ac4d399eec656d162c0e3dc9afb7286b07dd8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZZ8A2481562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313386f78ca838079e1157d99ac8a520e1d475e1ccef627d030c99304f436801. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZZ8A2481565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc643abab4d1aea34954009e82e0086bf9330ba1f949fe52aa1336fc79f878bf. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZZ8A2487504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fce05b0b5a378c9b123b2c6ed73120ea67f1792097077ea6e90b5b72d742290. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZHN92519128.