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 0xa122f0bee438f50890c10ebf6edf43bdaa81da07ba42591db5fc524846a72dd4. 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/b2c9b4e4-26d7-44d5-bd90-e7ed1dd1d531.json and https://artists.proofprofile.net/proofs/artist/b2c9b4e4-26d7-44d5-bd90-e7ed1dd1d531.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 0x4b1b7238ce468fe35a6281a146a31e0521c39b37a98cfabeb90416e522528c3c. 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/QZMEM2166854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e49a769fb39e82e77e15ba901e3407da40bb0b0fd5d4b8b3e9f2437ca39437. 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/QZMEM2166857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dd463e87076b2f370e965365f2e1a0393765d7abffba4b1261d465ee0cb0f3. 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/QZMEM2166858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b97144d4ae497794b67d8a3d320068fbce3af3e54591189373148b6a8dacca0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN42274274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ba6b589a3171f24db2414770faec32cfdc3bd9341bd028fce3576343ac6b5. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZPLS2280666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d75d843cfa759445501fe97e5dcf2df3e94f23b2efc49fcb87a8f0ccbe30004. 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/QZTAX2274408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d09ca375acfc737aa81fbcba6bafe5fa291c5b5eb41e55fabe3cdec07d1844. 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/QZTAZ2223106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943a1d68b3b0df09677a8e70a7398bf274f8601ec60dae029c0a5cb7f1c1a46. 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/QZTB22205328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90d9a72c7bc8310950c3a6392cbe22000b73e4b620101b64b6211f6350375be. 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/QZTB22205329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4e2aa9570dddb253bda606eeb8a69e52e4ad8039717ac5545ce841c3363880. 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/QZTB22205330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc14e0b65988d07a29af5b356713528e682d3a1a4ebfab5b49fca55096a9eaa4. 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/QZTB22205331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85875aa89e2d87bf80cb6f97f4cf386344cd73c58c98ebd592ad0266da3be251. 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/QZES62213427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94981bb28daead98bb888607f3cbbae61304cd2c241927ad81722f3ed191704b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA42324109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11687532b0fa951b8ec8a8998406b41fea81c80a148163cd1541c87db033f60e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZES82378373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3724b8147c71ab33f3bd0579a3830ed25a65af278d301630c3d78eaaa483d2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZMEM2331964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418d9a475e74bb98772dc92e1eb7b8517079c2c436d22a7593bd591e7d1e24ba. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZNWZ2339031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49aeaefc0cb857051a36dd6c62f82266f1f9eeca91cb8057791dd25047ec9e77. 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/QZTAY2362411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6bd823d87f94977310206a50294b52efec5c3fa5bb2624d5a5f8d65c3d9306. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZTB72324149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36da975d7ae29aa30fb49275499473bd90941acb039fdb61e4792d29272c7ea. 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/QZTBB2359581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c7d02a6db3621fd7de2b782ac2b3869447840b02933e7c694954296f1f3101. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES72402318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba44397cabcec4bc62421f78eeae6e0e4cf4c5efc64a72d8f707ed069e715804. 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/QZHN62467490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb501f7d4caf7be9365a06ef182e5abc27e1f0ed4a5e4be6b5354d2d4e5a76dab. 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/QZK6N2416140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf672dadfdcf0ba4a57aac60363e461ad559d6006ba2d9631cf4550375900cd65. 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/QZHNC2463836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d8ede1109719e971e6235aae2c47ff284bd07254ca0c4b736bf425534f04d7. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZK6N2416141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeace4fbafdd66cf8c1b52c62298c583d1a57257fd80d2d6c973aff32b98a064e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6N2416142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6447958fb25a8ed645579aa21fd2e748ed6debf403cc680eeb4786d20b3f0ac2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWZ2485896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa943d85ce63765d768c8cb27593cd699cf3b9a5a7bc8b6e7002d076e8fde0fdc. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/UKZGC2408190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcb1c42d7646169299c33c8d6cafa9c111f7f155144998ba5ee8a79038d7067. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/UKZGC2503519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134810e04e32bee16382350811436ce8a1bbfabde3b04ed37ff55e211674dfc1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/UKZGC2503705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fb8a25a8ac6602e08c2f23fd345ea41f507ddd5f9194e58fcd268529706ac7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/UKZGC2503947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784461e3aa4c2a093d76e735d544d734078cd26712b8cb481b5d004b8de8a86b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKZGC2503951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aca7cd2a0c1da274f5b422a099e37d9b6f7a58e9bd55a55d122185ac1593ee. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6MZ2541734.