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 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 0x94aeac053acdcaedaf9b011ce653fbcf45e9960e1547e58f69ed801cfe2d4417. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73f0c9f4-bcc1-43ca-81d5-4ce2e1aee6dd.json and https://artists.proofprofile.net/proofs/artist/73f0c9f4-bcc1-43ca-81d5-4ce2e1aee6dd.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 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 0x69546896fc17dbc9daf0d6a8ccc79a037a63f77a7866edfa282d01dfc8e864cf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FIWMA2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f31dad077859444a12aecf8a000d909ba838197d7a72e92c85c5c385256e757. 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/LTF272400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdcf277362fd9922351335ac263fe8b06c88708120b8ac981513eddb23105c5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/LTF272500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76350645a892062ebfa71322ea04c669801416a4a80fd5c7e9baacb97a0ea94. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/LTF272500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea5701e125a213fa1903d77ccf28eb55c283a70cf62fb43c52ac7d4e056152b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/LTF272500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ff357667c758c63bc80f81cfaf35c2cb03b74f38066c6033ecd8a9e956e753. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/LTF272500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9be2e5634b13c1662ccb86d2acadc3fc05553ab2325daba475bef3992576e9. 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/LTF272500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0733f54db17be720314a19ed4be24455a03d915a29d8404889a6a0f0767a23. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/LTF272500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed789894b2f9208475c1d8cb48a55a0614857b5f3c85fe6020a44f047784ee5. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/LTF272500008.
saltos nutirpusios rankos ir akys kaip gyvulio svetimos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad71b1078b63583c3ea64130846475984d59841f2132c7e473fd817465eecf. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/LTF272500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa303f46f53fd54368175749deacc3c245056d72d5f50ef270ade2c8e05c95835. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/LTF272500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4087803c91595649a6dae0ea62bdb71324eb1b3de1f51352f6f75080bbccdd12. 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/LTF272500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2585ec12489793a6e4e192b33dab7aa2af97c3d29138bb6b8c9ff3ba3e67f323. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/LTF272500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b243008b59953c7c6881d7d52effe1925c8c4c713e12e6bbadff488cdb8dd31. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/LTT132500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8946dbfed062e973cf22fd48eeec27eb780d1efc154cce6538b4f16475f1d8. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/LTT132500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8655b0715fa09af8efd45bbc961bbbffad8916939e8d9c5dd864ce3406b43017. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/LTT132500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c66065a4acbe82f5e3f01c157eb26f525d8cd6036202a1ecfa86952db68053. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/LTT132500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d6b6d63664d01f11d9656431c1a50c5b7c0f4cd4cd9e65364f4a430c0eb34f. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/LTT132500005.