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 0x25d34c9b027c0327a27dcc2808b70dfb869c4837e5ffe5f3309cfbfc4b770a98. 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/0eb4d69d-8bb7-4f30-bfd2-9b08977d3736.json and https://artists.proofprofile.net/proofs/artist/0eb4d69d-8bb7-4f30-bfd2-9b08977d3736.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 0x806cd516f36b023b482e912434828c170b62a4edf347a79403ddf44a42981cc6. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNW72247681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f01a2afe521fa83ddccf048d7f7e72c45a6a68295ac483bec3afdf8649701f. 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/QZNW72247693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3613252340641daa3d6d755244c8da2a4dff2bcb39a3304b277903893b6d1b43. 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/QZZ8A2388640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b019554de54c75dc99e64378d4cd4da8b67c2e7ad8564178b176d01b227b1ea. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/QZZ8A2390069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd77bf4c6ce86aabcadfc07dc973bfb362da133f58ce34c7ab8d704aacfe8b5. 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/QZZ8A2390734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fdd7c664da9a5d4a0e1bc3f132f5de7536541d1b2a5da61f7d3c8dcc80ef5b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:52:48Z), 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/QZZ8A2390757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dfaa737a5f40fd6d7a3c73bdab03249737555bf4ed9b72c366bcc0410ca4b2. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZZ8A2391347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3a8ead158bbefc79e0afd5c023a1e0631e06b8bef363d56938c3dedd728de4. 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/QZZ8A2389900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12da50cb41012b81a501f9b641960de0e94d7b4ba1a4fd6485777e81347e169f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ESA012242271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf3df9e385089edb32831154c7acbac56a523433575288fdfddfccff9f2927c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFS2570667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539a95d69a0f2d8b1d60ecb92c7f7836ede2bbeeb23bd434b5945fd411b9b792. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFS2570668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336a4a49940eeab16f9d2527ebea56d0c71021316fa477fb3220bcb997ef7932. 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/QZWFS2570669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d7c4b64068a3b4c36ee7015e14eac1d5d0fa5b9dba29d6205ba25369402812. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFS2570670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfb3d0b2fce68f620d7527d9f7416f0f135abc33ac193d87d588a6ab33b0ef9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:59:16Z), 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/QZWFS2570671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb80ad38d2fee5de8989f0655b5e9a3fc9b28d84c13824307505fd1400f73318. 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/QZWFS2570672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc94272d8c740bf6c701c64e535b791fc7cfbbd45ccbd0e32449dc7bc7bbdb1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFS2570673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de00111f0e6c6a19a915f4513055d7e3e1f333f06e8774e5b3d8e5a2e041b60. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFS2570674.