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 0xd09ee56a2c94e186bc29f6ba3b370daaf337e828489bc58cbf3d4cc50e558eb7. 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/f9c1af13-1521-40ae-8c85-0c4590f65222.json and https://artists.proofprofile.net/proofs/artist/f9c1af13-1521-40ae-8c85-0c4590f65222.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 0x92ae71e3551ab29921e0e0d783b30cddafaba878c439289672aefe49c7c55d20. 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/UKR6V2442085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6344f0a923613c81f7a770ebf212ae327edd3f001bc71fb7d79ded038580f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKR6V2442086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866929485a77348f293c1145b62e23df875e42f54569509c013b82abed4912c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GXBNP2410006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5ddbde387e534bc9a4aae098cedb98cd4d6ccb37715264a0e65a2830246aba. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GXBNP2410007.
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 0xcf2d17f6d5a7891940ab477c5c1674f679d4ae25f97326becf8815cbe588dfa9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA0P2316616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea71be0a540bc5f6cbdde67f2b12ed88f3067b632d74a70925e71f320655301. 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/TCAHR2375460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fad54d4025c965afbdd93aa293d1d5cca04da604b6891b8a335aacdc88dce3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHS2331715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e361026a6854e408b3f03568cd719e345f9aebd0d82a0aa68cad494801d1eb1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHS2331720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b29197e1893c7654fa44fd73b1c80655e92aaee23dd4f49e9197d6211e9fb7d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHS2331726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd66673aa15f64659f5601fc254308044db643e72b850a0c6142c963530c1021. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHS2331730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e15fc5d5f468e44dfd37e3103c153dcece64635b3327d644690b5259ef44948. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAHR2375451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33be88a9fd2c931d9f341cdafc0217b4f4e31e18b737cb0dce2b30c6a78caf63. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0P2300442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee26ce275ff6f702d0a85aaa2bf6f17f4693846a07328e55da682529cf95be95. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHP2399949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670433db8588f57f88fb0eaccb3ffbd82ed3f7757e641225795079c4030e4aa8. 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/TCAHP2399953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79319768cf51d59a9b95c34bfbbe8576d6251200b04b5d1fcbbdff569ddf928. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:52:59Z), 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/TCAHP2333615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ae49d875376235a7cd8e57ff47815d2c4135224cba7baad5b367441087d6e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHP2333642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a159a5740d2377930a09d9d04c6a288bdf5edc8244dd0ec59362d95ec98fbb5. 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/TCAHP2333663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6ce21d3759f7dc3fd97a9b4633103f8e1f691959eb3e63432e0d875663537. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHN2398659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6a35826083837b099f3a66e0229d5144400043d6ecd3be17ce0f5878c9ed8b. 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/TCAHN2398662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db84a8c06fc919f75bcd805874ecf3344bdead39b7577802ee1fb26a87e7b38. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA092370780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef5c0223353d42b26d5e75f3cfcd92e54c16bfa02c894c0a37d6a8b5d5432c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DGA092370781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5b0c2ea945ca2730ae8c9b4dd075b2e5af9b56ddb312b060a2132a20708400. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA062347862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192499b3dd935133ab74b1675e295833a846a4931b42e4a87276a1e8c97064bc. 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/UKR6V2340298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2685f48c876445010efcd09015ae0d7e260e36e3d5c490ff34fcf369ecfde282. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGW2349226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4494934ac3b3a0125cb5b40686aaa3ff036b9f3716abc7b352b9367c75f4bfe9. 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/TCAGT2306529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee4a40827f68596a03fae95e0a43391b7436e61081a48ac454712e582498f6f. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/TCAGT2306538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc48a3f9633df06020862a73eb197c81b7cb9bd61a589b9e44b257035f20ecf2. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/TCAGT2306521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e505e897f8c10710dfc03a95ab919d419d3c886e0443528aa4aeccbfff95640. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAGS2219844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626e8ded0507fe72a6b85734d8b907bfdbeddab465f4d0b75cd39db82196d73. 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/TCAGS2219854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a1964e74e32bb2d6357f9657b9babf086bb6b1d103860a902a92af71855bf3. 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/TCAGO2278233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051814a7965aac0259e2f57102ef866997838528061a1b03f8a2de1c1d0cf8f7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAGO2278239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727dea43c954b06fed41471ac8c9030f5fb864c2644641ded62776fcd9d32f4e. 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/UKR6V2290560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118b9262a90f02369acbe73bd9ac32837b89a655bd28ad5a596e2b070147eacd. 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/UKR6V2290562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eda051533c48763f7b76c8ea9426ae2b6a9559681b638f29eaf72422a9ae2ac. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR0038524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b2bd9952cf07a96880aeef22c714be4ff5351b875501a45779206fcb0d1429. 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/CA5KR0038525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f31c2e46a63e937e3ba0e6d2b0f0e31dbe331af3e35cabbf548bde15b5eec8a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA5KR0038526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b5c0851b0433cd98111f5e1d7d7f007c493ca21fe430a4abac62edb4fc1fc6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA5KR0038527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d45a2af40d57fc42c82232c1cb8a2fcadab7d84c6202470c10c1f045c306c3. 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/GBKQU1865959.