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 0xaba2b7913e8f4e057e3885fa249220e743902890daa92a0b6c96e4a102f05ac9. 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/ebb94a54-58e4-4ec7-b49a-68e3298b83b6.json and https://artists.proofprofile.net/proofs/artist/ebb94a54-58e4-4ec7-b49a-68e3298b83b6.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 0x4f6cbf008db049288b77cd7f41e8557ef6fa6ebdb9e5ecd3c89c3e23f0459e58. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CA5KR2230709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136dbf3cc85a1c6e3ade2f12ef7bd99053b79701232d92f2e47cee70016b7409. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CA5KR2230710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81158ac187e179890c8b4fb4c3ba1a52fd7734fe7bae79c03a3eb13229de3d10. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA5KR2230711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a9f6a7e6754f87fc6affeeb2719eeba499e05afde90747e41df94d44d16fd8. 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/CA5KR2230712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade4b8b66f9f051d0d044b7e299582a66a3395f264bc04e71aa42c4a8548a746. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR2230713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df2f6b6b979e239423736aaa277927773f89cbe69dcd9f1c1b9ef1ac4883ee7. 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/CA5KR2230714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de19f063b7b8c9f079812dcd6e2ea691f52020feba24e0b8406ecf166917eff. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2230715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c67b35d7a3b47428fd8a4256675f7f0d204b982ff4acc67b7a425047c171aff. 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/CA5KR2230716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575b4382a16d8bed9608bcff481918708c6feeee73eb74f561ac34e7f625c332. 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/CA5KR2230717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab05aac3a1c9326e5d48f52e7da6adcff6b5d485de2f4d8439fd35005af4cf56. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA5KR2230718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfbe5f92525ca573ba831e021bd112a79eedc160d7892a1715d1652478e2a39. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA5KR2230719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe295c11cf52a3cc96cf7e142a3b7fbbdc37e47017af5878bf2751e15d81e9f2f. 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/CA5KR2230720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444e6392374b092cfef4fc30144ea8a9a480b23ac83ac8bf0de632216567d3db. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2230721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71add3eae447ca25daf8b9e9588556a7e73d95f02d526b608d6638accf8c71b4. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CA5KR2230722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b73acc1d7f66eac1f1fbb71dc5a81c3cd02b2ca680f1f5f0dbfdfbb67c36cbb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2230723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302d60276eb4b80034d8c2b4a9b372ed5ac423bb7e1247c12892d94d737f1bb0. 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/CA5KR2230724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172676dbe3f63e1118559a19d91096353e29ea1fbed14b2412f1d42661a00246. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR2230725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf452739a3e8d5acb27163548f4a759c0cd586a4e7542d2b815e7e27935b9aad3. 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/CA5KR2230726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0851f3e444b2ddbcb668efe64d92e932bb87d6df0b19fbf70ac671eb0adfd011. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CA5KR2230727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f89b1d1645112228e2e3803c226e3802087fdb9b219fc8d8a0f5a121704b7a. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/CA5KR2230728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11e934248c24d19eeff2c78a73ea5fe16028cc2787a029c925cab2f8847c239. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CA5KR2230729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3ec9ea1f5be2138d8216e6cb6f04ffad109c627cdf85e7f2d86ace744b720b. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/CA5KR2230730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ce7743982d409cfa2efed2980c5f7c1424e2d9fa512181eed94810c71a5f2e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CA5KR2230731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3062d9e9c2b0a8781487e41f9a69634de0bc63a4e7c6ae6101ad1a447998ddb6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA5KR2230732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5412f646fc7f81c1fe00289c747fcda0f0524cfbd9464f0970fd372cab2e5e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2230733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc01355567a6e15cfcc2aec89c893987a23fda254d8690c101f473f848b3344. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CA5KR2230734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30262aca620844e39dc5a67217ab19a135bd9ca5c02f161568630ec2057499d3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR2230735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596a7d9f5e52bea415f2dd66854e76623ff5ea9b2c4c33b21446db7b3348551b. 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/CA5KR2230736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c13108e06ae869a9d1a91ac0de513bc524e5f1727e3a5069e936ffc32ab99c. 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/CA5KR2230737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3890ef651156b1b27dd6408da84a96a5c6334b1e79937e156a68922e1ea1ceab. 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/CA5KR2230738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9b6d62340daac016c661f097b8894fc3b534f5ffe97b27538294c771d1e185. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR2230739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5572eb4c863ec587b6bdbd60c4618ea37fedd42d6efcad749576c260603496. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CA5KR2230740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec9a0db249bca4bcd7ba04f9df6614aadd94e3343d58618c74b5660248b9dcc. 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/CA5KR2230741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf60a70fa2897031d11a2eeb15fb4483205ea538e7446f5f7414ffcb19b8c0c1. 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/CA5KR2230742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2374d99f1710d114fa37cbedf472573d4d8870f219ca93369c5653b963115f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/CA5KR2230743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f338c0405c089ae9b3cadf9c0788e3e96636758808cd4f46c0e70f897d7cd3e. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/CA5KR2230744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3a54dd8f65b817f6d1161fea93df3bd60259ff632b3396fffe7309dea6387e. 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/CA5KR2230745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776b01248d5bc0ce801591ccb1673cac948572180675ef6b5cf5848f5b788c87. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/CA5KR2230746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55988d109db481af2101b84dccd788c2fd73097238103f8a22191d4daaacd9b9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CA5KR2230747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77260bfe84ca93b445f4196a792486612368c0bcade91bff9cd176616a0e302. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CA5KR2230748.
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