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 0x60e1cd0ee4aa75638ad3c4900c336094e33a2d2e4173fbd60e27559ba718b7a6. 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/68aa1d33-94e8-4fde-bafc-83d78c4eec9e.json and https://artists.proofprofile.net/proofs/artist/68aa1d33-94e8-4fde-bafc-83d78c4eec9e.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 0x937aeddb1fd33849719fc913b7a05eeac78e106d23fc730c3a53e5170f0bf1f8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWU2239694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175253ae23c0e26388f4bef4815435d0b85b9b1a79287edf8a2cb1a2f7748770. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNWU2241486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bcdb2b15eb1bedacf634f6628c1959fe055d82d24bccbb277db9df29892521. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZTB32290517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5e6ae44d247e5e20154b55da33664a612eea156662ac68ea73998dab847988. 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/QZTB62225804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8292831aecb68e5f7911018dc8e7ed25a5d3a9e6d2b8ff5d51008842623bbe84. 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/QZES52324118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb069f3f5ef8066b796a3a7643ceb9db3a75d986ad9e7851c51b32fca45ff3629. 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/QZES52324119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab2b995ac38e5c354523d9ce6a9f53a34963a2380d7315d7e0edb6da8117b30. 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/QZES52324120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ce35c34693bcff842d8adfe4d17e5fdde87f85d5e86855bd2ef4e242bbd0f6. 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/QZTB62382115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c6d2e47bb03694225e302b8551f974ee0632b8778ac0b6a7ba566ed76a5874. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTB62382116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ab8a7e3ab742a46d9b246013de7d04eb3ae0115e48cd76b2f41835679c95dd. 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/QZTB62382117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141d2f99a431f095e0ead28dc1afa2f5db588e9e01e5ec97803035d8d7c11506. 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/QZTB62382118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4859ff7a6043bd474b31d40d9539e77387ba3e58cbb3a2ba676c59959d24100. 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/QZTB62382119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7dd7223cecc2a554e64e08a29eac9ba488436d79830b1cec5bb8ca75639c9c. 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/QZTB62382120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74de68162f13d09dbe544dbb6cb51c4bd38143aad2b12398bc5efe318862bdcf. 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/QZTB62382121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a742dd9c3ea530f59a2763d622937aeb988fcec3b711d1645d45e61b549a77. 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/QZTB62382122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b0dec4cbe62ff7b9557151e5fd1790027d0082812fe824af3499dfcbe08d38. 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/QZTB62382123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f1846e454c133a8f292de7f465eddc3840a13d57c06fcbc483f136961721ad. 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/QZWFR2303139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecff57fba9dbd423476777ad076315faee71e5773dd49b44bb9aeb990361ff77. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZDA42428337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b3ec23d0002c46a962fd90434b2547720ec1acce7041bd70490cbc07c7fb41. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA52418934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ad1a1d87d26b6dd57fb1ceeceee24eabb15f7e0efeda84e711015dc8e21b4d. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QZDA42428272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a404377d260be7b405ddbefa2e5321431e5cb18b49b8b3724c07fdaaf1f8d5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZDA42428324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5137ee5c7b715c3cb08db86cc03503fc23d9c55b2bf0d5682b47cc7411d0b5e2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZDA42428305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133e14a3eee5363d02477b6d17256fc9c40d6556ebafea854110c8aa77ac7f80. 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/QZHNB2451714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d72c798c4897fbfc8fcf97ac9c7d9947d5490e10e9759fc4e8f442366b38df. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZWFX2474929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856e2c46647a56834905b38b4e1b50acd92a3cb900551d9e78dea22d08488641. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZZ772403260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd805f4e41760420b630d1381a3bc24e270b0da2292c0c90d65aef4c6523b16c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZZ762432952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e38252f3ba75610582a49f6d8433d1d58d7ebd50861f5cd3d48425a05192b41. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZZ762432953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d7beaee367aa987bbb0735baf3b6360032e51d4ba28846a8ee937c6daa7dbb. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZZ762432954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586ada8343497eec6ab89d792b5ac159494dec9e577d131f225bb54de319296d. 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/QZZ762432955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c69719a45268a3074d8339b9e10b7d7ddcaf93a28df4182703ce47f8384b6a. 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/QZZ762425841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6538ae0d2724349814eb0240a274287eecd5b9894621ee04b60cc9aafc679a8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN92567839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a19a5a543781bc122e5b64e321506bae7f8bd6f9c289be3822f1aeba69a35b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWT2551306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbc3b76456b60a3cce6347fa28a83a60bb86fecef96e614afda070ccc0acc63. 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/QZTB92585990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b607fb9a0e263e382da864bb0048d2774ae8897d7f376ba55dc84a985893a1e. 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/QZTB92585992.